PostgreSQL: Difference between revisions

Latest revision as of 20:46, 19 January 2026

export PGPASSWORD='p@55w0rd'

# deploy@cdn.chorke.org:~ #
psql -U postgres
#psql (10.15 (Ubuntu 10.15-0ubuntu0.18.04.1))
#Type "help" for help.

# root@cdn.chorke.org:~ #
su - postgres
# Last login: Tue Jan 01 12:00:00 MYT 2013 on pts/0
# -bash-4.2$

psql
# psql (9.6.8)
# Type "help" for help.
# 
# postgres=#

Connection String

# parameters based psql
psql -U postgres
psql -U academia postgres
psql -U academia -h rds.vpc.chorke.org postgres
psql -U academia -h rds.vpc.chorke.org -p 5432 postgres
PGPASSWORD='sadaqah' psql -U academia -h rds.vpc.chorke.org -p 5432 postgres

# connection string based psql
psql 'postgres://postgres:@:/'
psql 'postgres://academia:@:/postgres'
psql 'postgres://academia:@rds.vpc.chorke.org:/postgres'
psql 'postgres://academia:@rds.vpc.chorke.org:5432/postgres'
psql 'postgres://academia:sadaqah@rds.vpc.chorke.org:5432/postgres'

Login Error

Connection String

# root@cdn.chorke.org:~ #
su - postgres psql
# Last login: Tue Jan 01 12:00:00 MYT 2013 on pts/0
# /bin/createuser: /bin/createuser: cannot execute binary file

# root@cdn.chorke.org:~ #
su postgres
psql -p 5433
# psql (12.9 (Ubuntu 12.9-0ubuntu0.20.04.1))

# deploy@cdn.chorke.org:~ #
sudo su postgres
psql -p 5433
# psql (12.9 (Ubuntu 12.9-0ubuntu0.20.04.1))

Cluster Login

Cluster Login
pg_lsclusters sudo su - postgres	psql -p 5433 psql -U postgres -p 5433
GRANT ALL ON tmp_coll TO academia; GRANT ALL ON test_json TO academia;	-- psql -V SELECT version();

Creating User

# root@cdn.chorke.org:~ #
su - postgres
# Last login: Tue Jan 01 12:00:00 MYT 2013 on pts/0
# -bash-4.2$
createuser root
# createuser: creation of new role failed: ERROR:  role "root" already exists
# ALTER USER root WITH SUPERUSER;

Creating DB

Creating DB
Until creating root database it's always show error `could not change directory to "/root": Permission denied`. To overcome this error we should need to create a root database. only for avoid error while login using root user.
# root@cdn.chorke.org:~ # su - postgres # Last login: Tue Jan 01 12:00:00 MYT 2013 on pts/0 # -bash-4.2$ createdb root
Similarly you can create a database as same as your frequently used OS User. In this case no need password to login. It will authenticated from OS. That's means you can login to your PostgreSQL user using OS Authentication.

Grant Privileges

Grant Privileges
# postgres=# grant all privileges on database root to root; # GRANT # postgres=# grant all privileges on database postgres to root; # GRANT

Extensions

ENABLE_DB_LINK=$(cat <<-DDL
CREATE EXTENSION IF NOT EXISTS dblink;
CREATE EXTENSION IF NOT EXISTS dblink SCHEMA extensions;
SELECT * FROM pg_available_extensions WHERE name = 'dblink';
DDL
)
echo "${ENABLE_DB_LINK}" | psql -p 5432 -U ${USER}
echo "${ENABLE_DB_LINK}" | psql -p 5432 -U ${USER} academia_data_staging

ENABLE_PG_CRYPTO=$(cat <<-DDL
CREATE EXTENSION IF NOT EXISTS pgcrypto;
CREATE EXTENSION IF NOT EXISTS pgcrypto SCHEMA extensions;
SELECT * FROM pg_available_extensions WHERE name = 'pgcrypto';
DDL
)
echo "${ENABLE_PG_CRYPTO}" | psql -p 5432 -U ${USER}
echo "${ENABLE_PG_CRYPTO}" | psql -p 5432 -U ${USER} academia_data_staging

sudo apt install postgresql-16-pgvector

ENABLE_PG_VECTOR=$(cat <<-DDL
CREATE EXTENSION IF NOT EXISTS vector;
CREATE EXTENSION IF NOT EXISTS vector SCHEMA extensions;
SELECT * FROM pg_available_extensions WHERE name = 'vector';
DDL
)
echo "${ENABLE_PG_VECTOR}" | psql -p 5432 -U ${USER}
echo "${ENABLE_PG_VECTOR}" | psql -p 5432 -U ${USER} academia_data_staging

Logout PSQL

Logout PSQL
# postgres=# \q # -bash-4.2$

Meta Data

-- show databases
SELECT datname FROM pg_database;             -- \l+

-- show sequence
SELECT c.relname FROM pg_class c             -- \ds+
WHERE c.relkind = 'S' ORDER BY c.relname;

-- show tables
SELECT * FROM pg_catalog.pg_tables
WHERE schemaname NOT IN ('pg_catalog','information_schema');

-- describe tables
SELECT table_name, column_name, data_type    -- \d+ my_table
FROM information_schema.columns WHERE table_name = 'my_table';

-- find tables with similar field name
SELECT table_name, column_name, data_type 
FROM information_schema.columns WHERE column_name LIKE '%slug%';

SELECT pg_database_size('my_database');                     -- \l+
SELECT pg_size_pretty(pg_database_size('my_database'));     -- \l+


SELECT 
    db.datname AS db_name,
    pg_size_pretty(pg_database_size(db.datname)) AS db_size
FROM pg_database db ORDER BY pg_database_size(db.datname) DESC;



SELECT pg_size_pretty(pg_total_relation_size('my_table'));  -- \dt+
SELECT                                                      -- \dt+
    table_schema, table_name,
    pg_size_pretty(pg_total_relation_size(quote_ident(table_name))) AS table_size
FROM information_schema.tables
WHERE table_schema = 'public'
ORDER BY 2 ASC;

XML Query

XML Query
Skipped » Find More 👉 PostgreSQL » XML

Array Query

XML Query

SELECT dependencies||'"Running Fiscal Year"'
FROM scope WHERE name = 'Fiscal Year Config';

SELECT * FROM user
WHERE owner_ref LIKE ANY (ARRAY[
   ',academia,chorke.org,shahed.biz,'
]) ORDER BY id ASC;

SELECT * FROM user
WHERE owner_ref LIKE ALL (ARRAY[
   ',academia,chorke.org,shahed.biz,'
]) ORDER BY id ASC;

JSON Query

JSON Query
Skipped » Find More 👉 PostgreSQL » JSON

Delete Join

-- USING is not an ANSI standard not supported by others RDMBS
-- it's better to use sub query rather than USING for join
DELETE FROM product p USING category c
WHERE p.category_id = c.id AND
c.name = 'Grocery';

Sequence

CREATE SEQUENCE IF NOT EXISTS public.policy_1000
    INCREMENT 1
    START     46656   -- 1,000
    MINVALUE  46656   -- 1,000
    MAXVALUE  1679615 -- Z,ZZZ
    CACHE     10;

ALTER SEQUENCE public.policy_1000 OWNER TO chorke_init_pro;
COMMENT ON SEQUENCE public.policy_1000 IS 'Academia Policy Sequence';

SELECT CURRVAL('policy_1000');
SELECT SETVAL('policy_1000', 0);
ALTER  SEQUENCE IF EXISTS policy_1000 RESTART 1;
SELECT NEXTVAL('policy_1000')::int AS policy_id;

GRANT USAGE, SELECT ON ALL SEQUENCES IN SCHEMA public TO chorke_init_pro;
ALTER DEFAULT PRIVILEGES IN SCHEMA public GRANT USAGE, SELECT ON SEQUENCES TO chorke_init_pro;

Echo/Print

DO $BODY$
DECLARE
    p_jsonb jsonb;
BEGIN
--  SELECT INTO p_jsonb '["", "template","{templateType}","{productSlug}"]'::jsonb || '["{filePath}"]'::jsonb;
    p_jsonb := '["", "template","{templateType}","{productSlug}"]'::jsonb || '["{filePath}"]'::jsonb;
    RAISE NOTICE '%', p_jsonb;
END;
$BODY$;

Execute DDL

Insert Using Loop

DO $BODY$
DECLARE
    p_id         integer;
    p_domain     varchar:= 'chorke.org';
    p_group_name varchar:= 'occupation_class';
BEGIN
  SELECT INTO p_id (COALESCE(MAX(id), 0)) FROM grouped_collection;
    FOR p_code IN 1..5 LOOP
        INSERT INTO grouped_collection (id, created_on, domain, code, name, group_name, extended_properties)
        VALUES ((p_id + p_code), LOCALTIMESTAMP, p_domain, p_code, p_code, p_group_name, '{}');
    END LOOP;
END;
$BODY$;

Anonymous Blocks

DO
$BODY$
DECLARE
    fiscal_year_ukc character varying;
    fiscal_drop_ukc character varying := 'ALTER TABLE fiscal_year';
BEGIN
    SELECT
        INTO fiscal_year_ukc con.conname 
    FROM  pg_catalog.pg_constraint     con
    INNER JOIN pg_catalog.pg_class     rel ON rel.oid = con.conrelid
    INNER JOIN pg_catalog.pg_namespace nsp ON nsp.oid = connamespace
    WHERE
        nsp.nspname = 'public'      AND
        rel.relname = 'fiscal_year' AND
        con.conname LIKE 'uk_%';
 
  IF fiscal_year_ukc IS NOT NULL THEN
    fiscal_drop_ukc := fiscal_drop_ukc || ' '
    'DROP CONSTRAINT ' || fiscal_year_ukc;
    
      EXECUTE fiscal_drop_ukc;
  END IF;
END
$BODY$;

Create Sequence

CREATE OR REPLACE FUNCTION fn_get_policy_no(IN agent_no character varying)
    RETURNS  integer
    LANGUAGE 'plpgsql'
AS
$BODY$
DECLARE
    policy_no       integer;
    sequence_name   character varying := 'policy_' || agent_no;
    create_sequence character varying := 'CREATE SEQUENCE IF NOT EXISTS ' || sequence_name;
BEGIN
    create_sequence := create_sequence || ' '
    'INCREMENT 1       '
    'START     46656   ' -- 1,000
    'MINVALUE  46656   ' -- 1,000
    'MAXVALUE  1679615 ' -- Z,ZZZ
    'CACHE     10      ';
    
    EXECUTE create_sequence;
    SELECT INTO policy_no NEXTVAL(sequence_name)::int;
    RETURN policy_no;
END
$BODY$;

SELECT fn_get_policy_no('0001');

Create Sequence with Comment

CREATE OR REPLACE FUNCTION fn_get_policy_no(IN agent_no character varying, IN agent_desc character varying)
    RETURNS  integer
    LANGUAGE 'plpgsql'
AS
$BODY$
DECLARE
    policy_no        integer;
    sequence_name    character varying := 'policy_' || agent_no;
    create_sequence  character varying := 'CREATE SEQUENCE IF NOT EXISTS ' || sequence_name;
    comment_sequence character varying := 'COMMENT ON SEQUENCE ' || sequence_name ||' IS ''' || agent_desc || '''';
BEGIN
    create_sequence := create_sequence || ' '
    'INCREMENT 1       '
    'START     46656   ' -- 1,000
    'MINVALUE  46656   ' -- 1,000
    'MAXVALUE  1679615 ' -- Z,ZZZ
    'CACHE     10      ';
    
    EXECUTE create_sequence;
  EXECUTE comment_sequence;
    SELECT INTO policy_no NEXTVAL(sequence_name)::int;
    RETURN policy_no;
END
$BODY$;

SELECT fn_get_policy_no('0001', 'Fareast Islami Life Insurance');
-- @Query(value="SELECT fn_get_policy_no(:agent_no, :agent_desc)", nativeQuery = true)
-- Integer getPolicyNo(@Param("agent_no") String agentNo, @Param("agent_desc") String agentDesc);

Create From Table Exclude Column

Create Sequence with Comment

DO
$BODY$
DECLARE
    create_table character varying;
BEGIN
    SELECT INTO create_table 'CREATE TABLE IF NOT EXISTS invoice__temp AS SELECT ' || STRING_AGG(isc.column_name, ', ') || ' FROM invoice'
    FROM (SELECT * FROM information_schema.columns WHERE table_name = 'invoice' AND
    column_name NOT IN ('id', 'created_on') ORDER BY ordinal_position ASC) isc;
    EXECUTE create_table;
END
$BODY$;

Date & Time

SELECT * FROM policy 
WHERE DATE_TRUNC('day', created_on) = TO_DATE('2021-12-31', 'yyyy-mm-dd');

UPDATE policy SET deleted_on = LOCALTIMESTAMP
WHERE DATE_TRUNC('day', created_on) = TO_DATE('2021-12-31', 'yyyy-mm-dd');

SELECT EXTRACT(CENTURY FROM TIMESTAMP '2013-10-10 10:10:10');
SELECT DATE_TRUNC('year', TIMESTAMP '2013-10-10 10:10:10');
SELECT DATE_TRUNC('hour', TIMESTAMP '2013-10-10 10:10:10');
SELECT AGE(TIMESTAMP '2023-10-10', TIMESTAMP '1983-10-10');
SELECT EXTRACT(DAY FROM TIMESTAMP '2013-10-10 10:10:10');
SELECT DATE_PART('day', TIMESTAMP '2013-10-10 10:10:10');
SELECT DATE_PART('hour', INTERVAL '4 hours 3 minutes');

SELECT JUSTIFY_INTERVAL(INTERVAL '1 mon -1 hour');
SELECT JUSTIFY_HOURS(INTERVAL '27 hours');
SELECT JUSTIFY_DAYS(INTERVAL '35 days');
SELECT AGE(TIMESTAMP '1983-10-10');

SELECT CURRENT_TIMESTAMP(2)
SELECT CURRENT_TIMESTAMP;
SELECT LOCALTIMESTAMP;
SELECT CURRENT_TIME;
SELECT CURRENT_DATE;

String Format

String Format
SELECT STRING_TO_ARRAY('/my/request/path', '/') "string_array"; SELECT ARRAY_TO_JSON(STRING_TO_ARRAY('/my/request/path', '/')) "json_array";

Number Format

SELECT NULLIF(regexp_replace('CKI00109'     , '\D','','g'), '')::numeric;
SELECT NULLIF(regexp_replace('CKI0010#9####', '\D','','g'), '')::numeric;
SELECT NULLIF(regexp_replace('CKI2203000075', '\D','','g'), '')::numeric;

Restoring the Dump

# export dumps
pg_dump academia > academia_20200210_1020.sql
pg_dump academia| gzip > academia_2020021.sql.gz

SELECT pg_terminate_backend(pid)
FROM pg_stat_activity WHERE datname IN
(
    'academia'
);
DROP DATABASE IF EXISTS academia;
CREATE DATABASE academia;

# restore dumps
psql academia < academia_20200210_1020.sql
gunzip -c academia_20200210_1020.sql.gz | psql academia

# export table as csv
psql -U postgres
\c my_database_staging
\COPY my_table_name TO '/home/academia/Downloads/my_table_name.csv' DELIMITER ',' CSV HEADER;

OS User Auth

CREATE DATABASE academia;
CREATE USER academia WITH LOGIN;
GRANT ALL PRIVILEGES ON DATABASE academia TO academia;
-- CREATE USER academia WITH ENCRYPTED PASSWORD 'sadaqah!';

echo "os-map          academia                academia" >> $PG_DATA/pg_ident.conf
echo "host    all     all     127.0.0.1/32    ident map=os-map" >> $PG_DATA/pg_hba.conf
pg_ctl --pgdata="$PG_DATA" reload;

DBLink POC

DBLink POC
Skipped » Find More 👉 PostgreSQL » DBLink

DBLink Exec

DBLink Exec
Skipped » Find More 👉 PostgreSQL » DBLink

Recursive Query

WITH RECURSIVE hierarchy AS (
    SELECT
        o.id,
        o.code,   o.name,
        o.parent "parent_code",
        p.name   "parent_name"
    FROM       org_unit  o
    LEFT  JOIN org_unit  p ON p.code        = o.parent
    WHERE o.code = LOWER(REPLACE('Chorke Agency', ' ', '-'))
    UNION
    SELECT
        o.id,
        o.code,   o.name,
        o.parent "parent_code",
        p.name   "parent_name"
    FROM       org_unit  o 
    LEFT  JOIN org_unit  p ON p.code        = o.parent
    INNER JOIN hierarchy h ON h.parent_code = o.code
)
SELECT * FROM hierarchy;

Encode/Decode

Encode/Decode
SELECT decode('Chorke Academia, Inc.', 'escape'); -- text to binary SELECT encode('Chorke Academia, Inc.'::bytea, 'escape'); -- binary to text SELECT convert_to('Chorke Academia, Inc.', 'UTF8'); -- text to binary SELECT convert_from('Chorke Academia, Inc.'::bytea, 'UTF8'); -- binary to text SELECT encode('Chorke Academia, Inc.'::bytea, 'base64'); -- text to base64 SELECT convert_from(decode('Q2hvcmtlIEFjYWRlbWlhLCBJbmMu', 'base64'), 'UTF8'); -- base64 to text
Base36 Encode
CREATE OR REPLACE FUNCTION fn_base36_encode(IN base10 bigint) RETURNS varchar LANGUAGE plpgsql IMMUTABLE AS $BODY$ DECLARE base36 varchar := ''; intval bigint := abs(base10); char0z char[] := regexp_split_to_array('0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ', ''); BEGIN WHILE intval != 0 LOOP base36 := char0z[(intval % 36)+1] \|\| base36; intval := intval / 36; END LOOP; IF base10 = 0 THEN base36 := '0'; END IF; RETURN base36; END $BODY$;
Base36 Decode
CREATE OR REPLACE FUNCTION fn_base36_decode(IN base36 varchar) RETURNS bigint LANGUAGE plpgsql AS $BODY$ DECLARE rindex int; intval int; carray char[]; base10 bigint := 0; char0z varchar := '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ'; BEGIN FOR rindex IN REVERSE char_length(base36)..1 LOOP carray := carray \|\| substring(upper(base36) FROM rindex FOR 1)::char; END LOOP; rindex := 0; WHILE rindex < (array_length(carray,1)) LOOP intval := position(carray[rindex+1] IN char0z)-1; base10 := base10 + (intval * (36 ^ rindex)); rindex := rindex + 1; END LOOP; RETURN base10; END $BODY$;

Large Object

Large Object
Skipped » Find More 👉 PostgreSQL » Large Object

Bastion Dump

BASH_REMOTE_SCRIPT_FRMT=$(cat <<'EOF'
# suppress stdout
echo '/* $STDOUT$'
echo "${HOSTNAME}${HOME}"

ssh -qt gtw.vpc.chorke.org <<'EOF_00'
echo "${HOSTNAME}${HOME}"
ssh -qt app.vpc.chorke.org <<'EOF_01'
echo "${HOSTNAME}${HOME}"
echo '$STDOUT$ */'

pg_dump postgres://academia:%s@rds.vpc.chorke.org:5432/%s
# suppress stdout
echo '/* $STDOUT$'
EOF_01
EOF_00
echo '$STDOUT$ */'
EOF
)

BASH_REMOTE_SCRIPT_PASS='sadaqah!'
BASH_REMOTE_SCRIPT_PGDB='academia_keycloak_staging'
printf -v  BASH_REMOTE_SCRIPT_EXEC          "${BASH_REMOTE_SCRIPT_FRMT}" "${BASH_REMOTE_SCRIPT_PASS}" "${BASH_REMOTE_SCRIPT_PGDB}"
printf -v  BASH_EXPORT_SCRIPT_DUMP '%s.sql' "${BASH_REMOTE_SCRIPT_PGDB}"
bash -c "${BASH_REMOTE_SCRIPT_EXEC}" >       ${BASH_EXPORT_SCRIPT_DUMP}

sed '/^\/\* \$STDOUT\$$/,/^\$STDOUT\$ \*\/$/{/^\/\* \$STDOUT\$$/!{/^\$STDOUT\$ \*\/$/!d}}' -i ${BASH_EXPORT_SCRIPT_DUMP}
sed -z 's|\n/\* $STDOUT$\n$STDOUT$ \*/||g' -i ${BASH_EXPORT_SCRIPT_DUMP}
sed -z 's|/\* $STDOUT$\n$STDOUT$ \*/\n||g' -i ${BASH_EXPORT_SCRIPT_DUMP}
gzip ${BASH_EXPORT_SCRIPT_DUMP}

Export CSV

psql -U academia academia_audit_staging
\COPY (SELECT * FROM audit_log WHERE action_type = 'Sync Collection' AND DATE_TRUNC('day', logged_on) = '20241010')\
 To '~/.config/audit_log_20241010_1010_MYT.csv' With CSV DELIMITER ',' HEADER;

Knowledge

Knowledge
# wsl (windows subsystem for linux) sudo service redis-server restart sudo service postgresql restart sudo service apache2 restart # comment and uncomment sql sed -i -e 's\|^\|-- \|g' src/main/resources/db/migration/.sql sed -i -e 's\|^-- \|\|g' src/main/resources/db/migration/.sql
-- psql CREATE DATABASE chorke_init_pro; CREATE USER chorke_init_pro WITH ENCRYPTED PASSWORD 'pa55w0rd'; GRANT ALL PRIVILEGES ON DATABASE chorke_init_pro TO chorke_init_pro; -- \q	-- revoke public connect from specific database after creation REVOKE CONNECT ON DATABASE academia_ebis_dev FROM PUBLIC; -- revoke public connect for all future databases REVOKE CONNECT ON DATABASE template1 FROM PUBLIC;
SELECT con.conname, nsp.nspname, rel.relname FROM pg_catalog.pg_constraint con INNER JOIN pg_catalog.pg_class rel ON rel.oid = con.conrelid INNER JOIN pg_catalog.pg_namespace nsp ON nsp.oid = connamespace WHERE nsp.nspname = 'public' AND rel.relname = 'fiscal_year' AND con.conname LIKE 'uk_%';
SELECT n.nspname AS "schema", c.relname AS "name", CASE c.relkind WHEN 'v' THEN 'view' WHEN 'i' THEN 'index' WHEN 'r' THEN 'table' WHEN 's' THEN 'special' WHEN 'S' THEN 'sequence' WHEN 'f' THEN 'foreign table' WHEN 'p' THEN 'partitioned table' WHEN 'I' THEN 'partitioned index' WHEN 'm' THEN 'materialized view' END AS "type", pg_catalog.pg_get_userbyid(c.relowner) AS "owner" FROM pg_catalog.pg_class c LEFT JOIN pg_catalog.pg_namespace n ON n.oid = c.relnamespace WHERE c.relkind IN ('S','') AND n.nspname !~ '^pg_toast' AND n.nspname <> 'pg_catalog' AND n.nspname <> 'information_schema' AND pg_catalog.pg_table_is_visible(c.oid) ORDER BY 1,2;
SELECT d.datname AS "db_name", pg_catalog.pg_get_userbyid(d.datdba) AS "db_owner", pg_catalog.pg_encoding_to_char(d.encoding) AS "db_encoding", d.datcollate AS "db_collation", d.datctype AS "db_collation_type", pg_catalog.array_to_string(d.datacl, e'\n') AS "db_access_privileges", CASE WHEN pg_catalog.has_database_privilege(d.datname, 'CONNECT') THEN pg_catalog.pg_size_pretty(pg_catalog.pg_database_size(d.datname)) ELSE 'No Access' END AS "db_size", t.spcname AS "db_tablespace", pg_catalog.shobj_description(d.oid, 'pg_database') AS "db_description" FROM pg_catalog.pg_database d JOIN pg_catalog.pg_tablespace t ON d.dattablespace = t.oid ORDER BY 1;
SELECT usesysid AS "user_id", usename AS "user_name", passwd AS "user_password", usesuper AS "is_super_user" FROM pg_catalog.pg_user ORDER BY 1;
DO $BODY$ DECLARE p_password varchar :='p@$$w0rd'; p_connection_string varchar :='hostaddr=127.0.0.1 port=5432 dbname=postgres user=postgres password='; BEGIN p_connection_string := p_connection_string \|\| p_password; RAISE NOTICE 'Connection String: %', p_connection_string; SELECT INTO p_connection_string 'hostaddr=' \|\| host(inet_server_addr()) \|\| ' port=' \|\| inet_server_port() \|\| ' dbname=' \|\| current_database() \|\| ' user=' \|\| CURRENT_USER \|\| ' password=' \|\| p_password; RAISE NOTICE 'Connection String: %', p_connection_string; END $BODY$;
cat << EOF \| psql -U postgres DROP DATABASE IF EXISTS academia_ebis_staging; CREATE DATABASE academia_ebis_staging; CREATE USER academia WITH ENCRYPTED PASSWORD 'sadaqah!'; GRANT ALL PRIVILEGES ON DATABASE academia_ebis_staging TO academia; ALTER DATABASE academia_ebis_staging OWNER TO academia; -- ALTER USER academia WITH NOSUPERUSER; -- ALTER USER academia WITH SUPERUSER; EOF

Allow Remote

Docker » Compose » Manage

apt install -y iputils-ping telnet dnsutils
sudo systemctl status ufw
sudo ufw status verbose

sudo ufw status numbered
sudo ufw allow 5432/tcp
sudo ufw enable

nano /etc/postgresql/14/main/postgresql.conf
nano /etc/postgresql/16/main/postgresql.conf

nano /etc/postgresql/14/main/pg_hba.conf
nano /etc/postgresql/16/main/pg_hba.conf

listen_addresses = '*'                  # what IP address(es) to listen on;
                                        # comma-separated list of addresses;
                                        # defaults to 'localhost'; use '*' for all
                                        # (change requires restart)
port = 5432                             # (change requires restart)

# IPv4 local connections:
host    all             all             127.0.0.1/32            scram-sha-256
host    all             all             0.0.0.0/0               scram-sha-256
# host  all             all             10.19.83.1/24           scram-sha-256
# host  all             all             10.20.13.1/24           scram-sha-256

Spread Sheet

=CONCAT("(LOCALTIMESTAMP, 'religion', 'chorke.org', (SELECT (COALESCE(MAX(id), 0) + 1) FROM grouped_collection), '",  SUBSTITUTE(A2 , """" ,  ""), "', '", SUBSTITUTE(A2 , """" ,  ""),  "', '{""state"": """ , SUBSTITUTE(B2 , "'" , "''")  , """, ""city"": """ , SUBSTITUTE(C2 , "'" , "''") , """}'),")

=CONCAT("[""",  SUBSTITUTE(A2 , """",  ""), """, """, SUBSTITUTE(A2, """",  ""), "",""", {""state"": """ , SUBSTITUTE(B2 , "'" , "''")  , """, ""city"": """ , SUBSTITUTE(C2 , "'" , "''") , """}", "],")

=CONCAT("[""",  SUBSTITUTE(C518 , """",  ""), """, """, SUBSTITUTE(B518, """",  ""), "",""", {}, " , A518 , ", ",  IF(ISBLANK(D518), "false", "true"), "],")

=CONCAT("[""",  SUBSTITUTE(C5 , """",  ""), """, """, SUBSTITUTE(B5, """",  ""), "",""", {""class"": """, D5 ,""", ""income"": true}, " , A5, "],")

=CONCAT("[""",  SUBSTITUTE(C27 , """",  ""), """, """, SUBSTITUTE(B27, """",  ""), "",""", {}, " , A27, "],")

=CONCAT("[""",  C27, """, """, B27, "",""", {}, " , A27, "],")

Docker PSQL

docker run -d --name postgres\
 -e POSTGRES_PASSWORD=sadaqah\
 -v ./init.sql:/docker-entrypoint-initdb.d/init.sql\
 -p 127.0.0.1:5433:5432\
 postgres:12.14

docker exec -it postgres bash
psql -U postgres
 
docker stop postgres
docker rm postgres

docker exec -it postgres\
 psql -U postgres
 
docker ps -a
docker rm postgres -f

References

References
PostgreSQL users can access all databases without any grants Creating user, database and adding access on PostgreSQL ASP.NET Core MVC Identity using PostgreSQL System Catalogs `pg_class::relkind` Query a JSON Column in PostgreSQL Fluent NHibernate with PostgreSQL Create sequence if not exists SQL Create Procedure PL/PgSQL Trigger 9.3 PL/PgSQL Trigger 10	Custom Thread-safe Sequence by Hibernate Date/Time Functions and Operators Convention for Database Tables Object Identifier(OIDs) Types Date/Time Support SQL Key Words `pg_lsn` Type Pseudo-Types Domain Types Data Types	`PL/pgSQL` Create dynamic table from string `PL/pgSQL` SQL Procedural Language `PL/pgSQL` Checking if a row exists `PL/pgSQL` Syntax Constants `PL/pgSQL` DBLink Connect `PL/pgSQL` Drop Function `PL/pgSQL` DBLink
Calling Stored Procedures from Spring Data JPA Explanation of cascade `ON DELETE/UPDATE` Concatenate a string variable in PostgreSQL Insert text with single quotes in PostgreSQL Append a item into the array-type Column Example of Stored Procedure Create Sequence if not exists Find all constraints of a table Multi-Line `PL/pgSQL` String PostgreSQL Dump	PostgreSQL `jsonb_set` multiple keys update Remove a item from the array-type Column How to show Large Objects (LOB) contents? Get TEXT value of a CLOB OID in Postgresql Using OS Users to connect to PostgreSQL PostgreSQL Export Import Script Online PostgreSQL turn a json array into rows Adding Data with `INSERT` and `COPY` PostgreSQL Delete with Inner Join JSON Functions and Operators	Does JPA delete also remove large objects of Blob fields Explanation of JSONB introduced by PostgreSQL Insert a Large Object using SQL in PostgreSQL Insert or update Large Object in PostgreSQL Change a User to Superuser in PostgreSQL Gist: Base36 Conversion in PostgreSQL Combination of `LIKE` and `IN` in SQL List all sequences in a PostgreSQL Base36 Conversion in PostgreSQL Remove attribute from JSON
PostgreSQL » Effectively Store & Index JSON Data PostgreSQL » Update a table using a WITH query PostgreSQL » Return Result Set as JSON Array PostgreSQL » Update all values in JSON Array PostgreSQL » pgAdmin » Export to a CSV File PostgreSQL » Nested JSON Arrays Query PostgreSQL » Nested JSON Querying PostgreSQL » Loop over JSON Arrays PostgreSQL » Export to a CSV File PostgreSQL » WITH Queries	PostgreSQL » `WITH` clause with `INSERT` statement PostgreSQL » PSQL Short Commands and Flags Column type is JSON but expression is Varchar PostgreSQL » `RETURNING` with `ON CONFLICT` PostgreSQL 14 not Started on Ubuntu 22.04 PostgreSQL » Dockerized
Convention for Database Tables Base36 Encoding and Decoding EclipseLink MapStruct Hibernate Liquibase MyBatis Lombok Locale JPA	PostgreSQL » Aggregate multiple rows as array PostgreSQL » JSON column with H2 PostgreSQL » 12 » XML2 Functions PostgreSQL » 12 » JSON Functions PostgreSQL » 9.1 » XML Functions Java » ISO `DateTimeFormatter` PostgreSQL » XML `xmlelement` PostgreSQL » XML » Categories Base64 Jasypt	PostgreSQL » PgAdmin » OAuth 2.0 » Configure PostgreSQL » PgAdmin » OAuth 2.0 » Enabling PostgreSQL » 12 » `pgcrypto` PostgreSQL » PgBouncer PostgreSQL » PgLoader MySQL

PostgreSQL: Difference between revisions

Latest revision as of 20:46, 19 January 2026

Login

Login Error

Cluster Login

Creating User

Creating DB

Grant Privileges

Extensions

Logout PSQL

Meta Data

XML Query

Array Query

JSON Query

Delete Join

Sequence

Echo/Print

Execute DDL

Insert Using Loop

Anonymous Blocks

Create Sequence

Create Sequence with Comment

Create From Table Exclude Column

Date & Time

String Format

Number Format

Restoring the Dump

OS User Auth

DBLink POC

DBLink Exec

Recursive Query

Encode/Decode

Large Object

Bastion Dump

Export CSV

Knowledge

Allow Remote

Spread Sheet

Docker PSQL

References

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