PostgreSQL SQL FOUND_ROWS SHOW TABLES - sql

I want to change this SQL to PostgreSQL:
1- $result = $this->query('SELECT FOUND_ROWS() AS found');
2- $result = $this->query('SHOW TABLES');


If you are trying to get the equivalent sql code from MySQL to PostgreSQL:
I think there no direct statement/function of FOUND_ROWS(), but you can of course get it using a function for example.
To get the list of tables on postgreSQL similar to SHOW TABLES of MySQL, you can use:
SELECT * FROM pg_catalog.pg_tables

Related

Oracle system information query - Database instance level

I am writing a performance/system monitoring tool to augment load testing for my team's product and I am trying to store database system information with the results bundle but do not know how to write the query to capture this in Oracle (I'm a developer not a DBA).
I have this all working the way I want for SQL Server, but I need to do the same for Oracle. Below is a query I found online for this is SQL Server:
SELECT CONVERT(varchar(128),SERVERPROPERTY('ComputerNamePhysicalNetBIOS')) AS 'computerNamePhysicalNetBIOS',
CONVERT(varchar(128),SERVERPROPERTY('MachineName')) AS 'machineName',
CONVERT(varchar(128),SERVERPROPERTY('Edition')) AS 'edition',
CONVERT(varchar(128),SERVERPROPERTY('ProductLevel')) AS 'productLevel',
CONVERT(varchar(128),SERVERPROPERTY('ProductVersion')) AS 'productVersion',
CONVERT(varchar(128),SERVERPROPERTY('BuildClrVersion')) AS 'buildClrVersion',
CONVERT(INT,SERVERPROPERTY('ProcessID')) AS 'processID',
CONVERT(INT,SERVERPROPERTY('EngineEdition')) AS 'engineEdition',
CONVERT(INT,SERVERPROPERTY('HadrManagerStatus')) AS 'hadrManagerStatus',
CONVERT(INT,SERVERPROPERTY('IsHadrEnabled')) AS 'hadrEnabled',
CONVERT(INT,SERVERPROPERTY('IsAdvancedAnalyticsInstalled')) AS 'advancedAnalyticsInstalled',
CONVERT(INT,SERVERPROPERTY('IsClustered')) AS 'clustered',
CONVERT(INT,SERVERPROPERTY('IsPolybaseInstalled')) AS 'polybaseInstalled',
CONVERT(INT,SERVERPROPERTY('IsXTPSupported')) AS 'xtpSupported',
CONVERT(INT,SERVERPROPERTY('LCID')) AS 'lcid',
CONVERT(varchar(128),SERVERPROPERTY('ResourceVersion')) AS 'resourceVersion',
CONVERT(varchar(128),SERVERPROPERTY('ServerName')) AS 'serverName',
CONVERT(varchar(128),APP_NAME() )AS 'appName',
CONVERT(INT,DB_ID()) AS 'dbId',
CONVERT(varchar(128),DB_NAME()) AS 'dbName'
I don't really expect a one-to-one column match between the above query and Oracle's version, but in general, how can I get very similar information from Oracle?

I don't really expect a one-to-one column match between the above
query and Oracle's version, but in general, how can I get very similar
information from Oracle?
Most of that stuff, if it exists at all in the Oracle database, will be accessible through V$ views in the Oracle database. To get you started, here are some that are going to be most relevant to answering your question:
select * from v$instance;
select * from v$version;
select * from v$sql_feature;
select * from v$license;
select * from v$option;
If you want to get a complete list of V$ views to look around better,
select * from dict where table_name like 'V$%';

Some of those things are specific to MSSQL and have no meaning in Oracle. But you can get many of them with sys_context() using the userenv namespace.
For instance, to get the database name:
select sys_context('userenv', 'DB_NAME') as db_name
from dual;

Get list of queries to oracle database

I use EF and Oracle.ManagedDataAccess to get/update/delete data from Oracle database.
How can I get history list of PL/SQL queries for this Oracle database ?

You can use this sql statement to get the history for any date:
SELECT * FROM V$SQL V where first_load_time LIKE '2015-05-04%';
Repeated: Find out the history of SQL queries
I don't know how to set the question as duplicated...

Create SQLite view as a union with source table name field [duplicate]

I want to write a query that examines all the tables in an SQLite database for a piece of information in order to simplify my post-incident diagnostics (performance doesn't matter).
I was hoping to write a query that uses the sqlite_master table to get a list of tables and then query them, all in one query:
SELECT Name
FROM sqlite_master
WHERE Type = 'table' AND (
SELECT count(*)
FROM Name
WHERE conditions
) > 0;
However when attempting to execute this style of query, I receive an error no such table: Name. Is there an alternate syntax that allows this, or is it simply not supported?

SQLite is designed as an embedded database, i.e., to be used together with a 'real' programming language.
To be able to use such dynamic constructs, you must go outside of SQLite itself:
cursor.execute("SELECT name FROM sqlite_master")
rows = cursor.fetchall()
for row in rows:
sql = "SELECT ... FROM {} WHERE ...".format(row[0])
cursor.execute(sql)

Is it possible to use a returned column value as a table name in an SQLite query?

I want to write a query that examines all the tables in an SQLite database for a piece of information in order to simplify my post-incident diagnostics (performance doesn't matter).
I was hoping to write a query that uses the sqlite_master table to get a list of tables and then query them, all in one query:
SELECT Name
FROM sqlite_master
WHERE Type = 'table' AND (
SELECT count(*)
FROM Name
WHERE conditions
) > 0;
However when attempting to execute this style of query, I receive an error no such table: Name. Is there an alternate syntax that allows this, or is it simply not supported?

SQLite is designed as an embedded database, i.e., to be used together with a 'real' programming language.
To be able to use such dynamic constructs, you must go outside of SQLite itself:
cursor.execute("SELECT name FROM sqlite_master")
rows = cursor.fetchall()
for row in rows:
sql = "SELECT ... FROM {} WHERE ...".format(row[0])
cursor.execute(sql)

How to get list of tables used in a SQL Server 2005/2008 function?

I'm trying to get all related tables used in a function.
How to get list of tables used in a function in SQL Server 2005/2008?

Try this
SELECT *
FROM information_schema.routines ISR
WHERE CHARINDEX('dbo.FunctionName', ISR.ROUTINE_DEFINITION) > 0