Database Discussion Boards

Re: Get all tables under a database in Postgre

Richard MacCutchan13-Jan-22 23:39

Richard MacCutchan

13-Jan-22 23:39

Did you try the link I gave you at Re: List all tables from a specific database - Database Discussion Boards[^]?

Re: Get all tables under a database in Postgre

_Flaviu14-Jan-22 0:06

_Flaviu

14-Jan-22 0:06

Yes, I have tried:

SQL

SELECT *
FROM pg_catalog.pg_tables
WHERE schemaname != 'pg_catalog' AND 
    schemaname != 'information_schema';

but this script doesn't take into account a specific database. I don't understand how is relation between database and table, in Postgre SQL ...

Re: Get all tables under a database in Postgre

Richard MacCutchan14-Jan-22 0:13

Richard MacCutchan

14-Jan-22 0:13

That is not what the tutorial suggests. The summary states:

Quote:
Summary: in this tutorial, you will learn how to show tables in PostgreSQL using psql tool and pg_catalog schema.

Re: Get all tables under a database in Postgre

_Flaviu14-Jan-22 3:32

_Flaviu

14-Jan-22 3:32

I realize that all available tables are below existing connection, which is the default database. And the default database must be choosen at the connection time. But yes, all databases could be listed in any connection.

Thank you for all your support.

modified 16-Jan-22 5:05am.

List all tables from a specific database

_Flaviu12-Jan-22 0:41

_Flaviu

12-Jan-22 0:41

How can I list all tables from a specific database in PostGre SQL ?

Lets say I have 3 databases, and I have several tables in every one each of them. How can I retrieve the table names for every database I have, using SQL command ?

With following command:

SQL

SELECT datname FROM pg_database	WHERE datistemplate = false

SQL

I got:
db_name
post_flaviu
postgres
test

Now, how can I find all tables under eevry db from above ?

modified 12-Jan-22 7:16am.

Re: List all tables from a specific database

Peter_in_278012-Jan-22 1:18

Peter_in_2780

12-Jan-22 1:18

Feeding "postgresql list tables in database" into your search engine will produce a zillion useful answers.

Software rusts. Simon Stephenson, ca 1994. So does this signature. me, 2012

Re: List all tables from a specific database

_Flaviu12-Jan-22 1:35

_Flaviu

12-Jan-22 1:35

Yes, I did. But I haven't found any SQL to tell me the tables for a specific database only.

Re: List all tables from a specific database

k505412-Jan-22 1:35

k5054

12-Jan-22 1:35

You can get Postgres to tell you how to do that using the -E (display hidden queries) option to psql. So for example

Shell

$ psql -E -l
********* QUERY **********
SELECT d.datname as "Name",
       pg_catalog.pg_get_userbyid(d.datdba) as "Owner",
       pg_catalog.pg_encoding_to_char(d.encoding) as "Encoding",
       d.datcollate as "Collate",
       d.datctype as "Ctype",
       pg_catalog.array_to_string(d.datacl, E'\n') AS "Access privileges"
FROM pg_catalog.pg_database d
ORDER BY 1;
<hr />

                                  List of databases
   Name    |  Owner   | Encoding  |   Collate   |    Ctype    |   Access privileges   
-----------+----------+-----------+-------------+-------------+-----------------------
 template0 | postgres | UTF8      | en_CA.UTF-8 | en_CA.UTF-8 | =c/postgres          +
           |          |           |             |             | postgres=CTc/postgres
 template1 | postgres | UTF8      | en_CA.UTF-8 | en_CA.UTF-8 | =c/postgres          +
           |          |           |             |             | postgres=CTc/postgres
 test      | ebacon   | UTF8      | en_CA.UTF-8 | en_CA.UTF-8 | 
(3 rows)

Likewise for the

\dt<dt> command inside psql.  Then all you need to do is to figure out how to combine both queries into one.<br />

<div class="signature">Keep Calm and Carry On</div></dt>

Re: List all tables from a specific database

_Flaviu12-Jan-22 1:59

_Flaviu

12-Jan-22 1:59

Thank you. That query retrieve all databases. And for all tables from a database only ?

Re: List all tables from a specific database

k505412-Jan-22 4:13

k5054

12-Jan-22 4:13

try

psql -E test -c "\dt". You can then take that output and combine with the previous one to get a listing of all tables across all databases.<br />

<div class="signature">Keep Calm and Carry On</div>

Re: List all tables from a specific database

_Flaviu12-Jan-22 4:32

_Flaviu

12-Jan-22 4:32

"get a listing of all tables across all databases"

That I already did. But doesn't help me, because I need the tables below a specific database, not all tables from all databases.

Re: List all tables from a specific database

Richard MacCutchan12-Jan-22 4:39

Richard MacCutchan

12-Jan-22 4:39

PostgreSQL Show Tables[^]

Re: List all tables from a specific database

_Flaviu12-Jan-22 5:19

_Flaviu

12-Jan-22 5:19

Thank you Richard. I have tried before, and now, the SQL from that page:

SQL

SELECT * FROM pg_catalog.pg_tables WHERE schemaname != 'pg_catalog' AND schemaname != 'information_schema';

And as result I got all tables, from ALL databases.

Untitled6 — ImgBB[^]

Re: List all tables from a specific database

Richard MacCutchan12-Jan-22 5:41

Richard MacCutchan

12-Jan-22 5:41

But that is exactly what that command is supposed to do. You need to follow the instructions from the top of the page.

Re: List all tables from a specific database

_Flaviu12-Jan-22 6:16

_Flaviu

12-Jan-22 6:16

I am pretty close. And what SQL command should I use to select the database, and after that to call SELECT tablename FROM pg_catalog.pg_tables WHERE schemaname != 'pg_catalog' AND schemaname != 'information_schema' ?

I have tried:

SQL

USE database my_database

but seem to not work:

SQL

ERROR: syntax error at or near "USE";
Error while executing the query

You know, I need to all this programatically, using SQL commands, not using Postgre tools.

modified 12-Jan-22 12:30pm.

Re: List all tables from a specific database

Richard MacCutchan12-Jan-22 6:43

Richard MacCutchan

12-Jan-22 6:43

Sorry, I do not have a system available to test this. However, I do not see any instruction concerning a USE statement in the tutorial on that page.

Re: List all tables from a specific database

Sakshi Jain 202212-Jul-22 23:18

Sakshi Jain 2022

12-Jul-22 23:18

1. Using SQL Query

To show the list of tables with the corresponding schema name, run this statement:

SELECT * FROM information_schema.tables;

or in a particular schema:

SELECT * FROM information_schema.tables WHERE table_schema = 'schema_name';

2. Using psql

To list all tables:

In all schemas:

\dt *.*

In a particular schema:

\dt schema_name.*

WampServer localhost

_Flaviu6-Jan-22 6:59

_Flaviu

6-Jan-22 6:59

I have installed a WampServer, and when I wanted to try it, seem that localhost is not available:

Untitled4 — ImgBB[^]

I noticed that mysql and mariadb services are running:

Untitled2 — ImgBB[^]

I only started localhost from here:
Untitled3 — ImgBB[^]

Also, other options from that menu are not working either: PHPMyAdmin, etc. What I should do to use MySQL database ? In fact, I only need to setup a ODBC source for MySQL database from WampServer, that's all.

modified 7-Jan-22 2:58am.

Re: WampServer localhost

Graham Breach6-Jan-22 21:10

Graham Breach

6-Jan-22 21:10

The web server is "Apache" - make sure you start that, then the web-based admin things should work (assuming it is configured correctly).

Re: WampServer localhost

_Flaviu6-Jan-22 23:53

_Flaviu

6-Jan-22 23:53

Ohh, I tried that before, but didn't start it:
Untitled5 — ImgBB[^]

I'll check the log to see why.

SQLite sqlite_schema missing

_Flaviu4-Jan-22 4:20

_Flaviu

4-Jan-22 4:20

How can I get the number of the tables from a sqlite3 database ?

I downloaded from here: SQLite Sample Database And Its Diagram (in PDF format)[^]
chinook.db
But when I try to get all tables from this database:

SQL

SELECT * FROM sqlite_schema WHERE type = 'table' AND name NOT LIKE 'sqlite_%'

I got:

SQL

no such table: sqlite_schema

I also tried to create a database on my own:

C++

SQLite::Database db("C:\\Temp\\mydb.bd3", SQLite::OPEN_READWRITE | SQLite::OPEN_CREATE);
		db.exec(_T("CREATE TABLE sqlite_schema(type TEXT, name TEXT, tbl_name TEXT, rootpage INTEGER, sql TEXT)"));
		db.exec(_T("PRAGMA foreign_keys = ON"));

and

C++

db.exec(_T("DROP TABLE IF EXISTS master"));
		db.exec(_T("CREATE TABLE master(masterid INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, name TEXT)"));
		db.exec(_T("DROP TABLE IF EXISTS app"));
		db.exec(_T("CREATE TABLE app (appid INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, name TEXT)"));
		db.exec(_T("DROP TABLE IF EXISTS device"));
		db.exec(_T("CREATE TABLE device (deviceid INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, masterid INTEGER, appid INTEGER, name TEXT, FOREIGN KEY(masterid) REFERENCES master(masterid), FOREIGN KEY(appid) REFERENCES app(appid))"));

but when I try the same SQL:

SQL

SELECT * FROM sqlite_schema WHERE type = 'table' AND name NOT LIKE 'sqlite_%'

I got the same error:

SQL

no such table: sqlite_schema

How can I assure to retrieve all tables from a db3 (db) file ?

Re: SQLite sqlite_schema missing

Richard Deeming4-Jan-22 4:40

Richard Deeming

4-Jan-22 4:40

SQLite Forum: Documentation issue (wrong table name) in FAQ, point 7[^]
The name has been changed to "sqlite_schema" as of version 3.33.0. The older name "sqlite_master" is still accepted as an alias for backwards compatibility. The FAQ is for version 3.33.0. You must be using an older version of SQLite.

Assuming you're not using 3.33.0 or later, try using the sqlite_master table instead.

"These people looked deep within my soul and assigned me a number based on the order in which I joined."
- Homer

Re: SQLite sqlite_schema missing

_Flaviu4-Jan-22 7:16

_Flaviu

4-Jan-22 7:16

Thanks a lot. That was the issue.

I have a small request: can you share which structure has this table, sqlite_master ?

I need a database_id, table_id, or appropriate.

Re: SQLite sqlite_schema missing

_Flaviu4-Jan-22 7:17

_Flaviu

4-Jan-22 7:17

Ahh, I think I have found it: SQLite: sqlite_master (internal schema object)[^]

Date and Time Add Incompatibility between sql 2012 and sql 2018

Medo-I23-Dec-21 7:42

Medo-I

23-Dec-21 7:42

Hello all

i have stored procedure running fine in MS sql 2012 but when i run it in ms sql 2018 i got this error message:

The data types datetime and time are incompatible in the add operator.

this is the line of the error :

SQL

(CONVERT(datetime, shfts.Date) + SftpStartTime) as SftStartDateTime,
case when ((CONVERT(datetime, shfts.Date) +SftpEndTime) 
			> (CONVERT(datetime, shfts.Date) + SftpStartTime) )

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.