15 Best SQL Queries for Developers [SQL Queries]

15 Best SQL Queries for Developers [SQL Queries]

In this Article, I will explain some important “SQL Server Queries”. I think “most of each SQL Developer” needs these important queries in the daily life!

How to use below listed SQL Quires”? And “What are the Advantages”?

As per this, I am tried to write these important “SQL Queries” and sharing with you! If you have any other smart query related to this (You can share to me and I will publish this post with your query!)


List of Queries with Result As,

--GET LIST OF DATABASES
EXEC SP_HELPDB

-- RESULT
name db_size owner dbid created status compatibility_level
CLR_Demo_BD       7.00 MB sa 7 Dec 30 2016 Status=ONLINE, Updateability=READ_WRITE, UserAccess=MULTI_USER, Recovery=FULL, Version=706, Collation=Latin1_General_CI_AI, SQLSortOrder=0, IsAutoCreateStatistics, IsAutoUpdateStatistics, IsFullTextEnabled 110
Demo       7.00 MB sa 8 Jan  2 2017 Status=ONLINE, Updateability=READ_WRITE, UserAccess=MULTI_USER, Recovery=FULL, Version=706, Collation=Latin1_General_CI_AI, SQLSortOrder=0, IsAutoCreateStatistics, IsAutoUpdateStatistics, IsFullTextEnabled 110
master       6.63 MB sa 1 Apr  8 2003 Status=ONLINE, Updateability=READ_WRITE, UserAccess=MULTI_USER, Recovery=SIMPLE, Version=706, Collation=Latin1_General_CI_AI, SQLSortOrder=0, IsAutoCreateStatistics, IsAutoUpdateStatistics 110
model       5.31 MB sa 3 Apr  8 2003 Status=ONLINE, Updateability=READ_WRITE, UserAccess=MULTI_USER, Recovery=FULL, Version=706, Collation=Latin1_General_CI_AI, SQLSortOrder=0, IsAutoCreateStatistics, IsAutoUpdateStatistics 110
msdb      21.75 MB sa 4 Feb 10 2012 Status=ONLINE, Updateability=READ_WRITE, UserAccess=MULTI_USER, Recovery=SIMPLE, Version=706, Collation=Latin1_General_CI_AI, SQLSortOrder=0, IsAutoCreateStatistics, IsAutoUpdateStatistics, IsFullTextEnabled 110
ReportServer      15.19 MB sa 5 Sep 14 2016 Status=ONLINE, Updateability=READ_WRITE, UserAccess=MULTI_USER, Recovery=FULL, Version=706, Collation=Latin1_General_CI_AS_KS_WS, SQLSortOrder=0, IsAutoCreateStatistics, IsAutoUpdateStatistics, IsFullTextEnabled 110
ReportServerTempDB       5.38 MB Lenovo-08\Viainda 6 May 26 2016 Status=ONLINE, Updateability=READ_WRITE, UserAccess=MULTI_USER, Recovery=SIMPLE, Version=706, Collation=Latin1_General_CI_AS_KS_WS, SQLSortOrder=0, IsAutoCreateStatistics, IsAutoUpdateStatistics, IsFullTextEnabled 110
tempdb       8.75 MB sa 2 Dec 20 2016 Status=ONLINE, Updateability=READ_WRITE, UserAccess=MULTI_USER, Recovery=SIMPLE, Version=706, Collation=Latin1_General_CI_AI, SQLSortOrder=0, IsAutoCreateStatistics, IsAutoUpdateStatistics 110

-- DISPLAY TEXT FOR PROCEDURE, TRIGGER, VIEW
EXEC SP_HELPTEXT @objname = 'Object_Name'

--EXAMPLE FOR DISPLAY TEXT
EXEC SP_HELPTEXT @objname = 'dbo.SP_Get_Students'

--RESULT
Text
CREATE PROCEDURE SP_Get_Students
AS
BEGIN
 SET NOCOUNT ON;

    -- SELECT STATEMENTS FOR PROCEDURE HERE

 SELECT * FROM [dbo].[Students]
END

--GET SQL SERVER VERSION NAME
SELECT @@VERSION AS VersionName  

--RESULT
VersionName
Microsoft SQL Server 2012 - 11.0.2100.60 (X64) 
 Feb 10 2012 19:39:15 
 Copyright (c) Microsoft Corporation
 Enterprise Edition (64-bit) on Windows NT 6.2 <X64> (Build 9200: )

--GET CURRENT SQL SERVER LANGUAGE 
SELECT @@LANGUAGE AS CurrentUsedLanguage

-- RESULT
CurrentUsedLanguage
us_english

--GET CURRENT LANGUAGE ID
SELECT @@LANGID AS 'LanguageID'  

--EXAMPLE
SET LANGUAGE 'English' 
SELECT @@LANGID AS 'LanguageID'  

-- RESULT
LanguageID
0

--GET LIST OF DATABASE PROCEDURES
SELECT DISTINCT SO.NAME, SO.XTYPE  
 FROM SYSCOMMENTS SC    
  INNER JOIN SYSOBJECTS SO ON SC.ID=SO.ID  
WHERE SO.XTYPE ='P'

--OR

-- USING LIKE FOR SYSCOMMENTS
SELECT DISTINCT SO.NAME, SO.XTYPE  
 FROM SYSCOMMENTS SC
  INNER JOIN SYSOBJECTS SO ON SC.ID=SO.ID  
WHERE SC.TEXT LIKE '%SP_%'

-- RESULT
NAME              XTYPE
SP_Email_Approvals     P 
SP_Get_Students        P 

-- REBUILD ALL DATABASE INDEX
GO
 EXEC sp_MSforeachtable @command1="print '?' DBCC DBREINDEX ('?', ' ', 80)"  
GO  
 EXEC sp_updatestats  
GO 

-- RESULT
[dbo].[Students]
DBCC execution completed. If DBCC printed error messages, contact your system administrator.
Updating [dbo].[Students]
    [PK_Students], update is not necessary...
    0 index(es)/statistic(s) have been updated, 1 did not require update.
 
Updating [sys].[queue_messages_1977058079]
    [queue_clustered_index], update is not necessary...
    [queue_secondary_index], update is not necessary...
    0 index(es)/statistic(s) have been updated, 2 did not require update.
 
Updating [sys].[queue_messages_2009058193]
    [queue_clustered_index], update is not necessary...
    [queue_secondary_index], update is not necessary...
    0 index(es)/statistic(s) have been updated, 2 did not require update.
 
Updating [sys].[queue_messages_2041058307]
    [queue_clustered_index], update is not necessary...
    [queue_secondary_index], update is not necessary...
    0 index(es)/statistic(s) have been updated, 2 did not require update.
 
Updating [sys].[filestream_tombstone_2073058421]
    [FSTSClusIdx], update is not necessary...
    [FSTSNCIdx], update is not necessary...
    0 index(es)/statistic(s) have been updated, 2 did not require update.
 
Updating [sys].[syscommittab]
    [ci_commit_ts], update is not necessary...
    [si_xdes_id], update is not necessary...
    0 index(es)/statistic(s) have been updated, 2 did not require update.
 
Updating [sys].[filetable_updates_2105058535]
    [FFtUpdateIdx], update is not necessary...
    0 index(es)/statistic(s) have been updated, 1 did not require update.
 
Statistics for all tables have been updated.

--GET ALL TABLE NAME USED IN PROCEDURES
WITH GET_Procedures AS (  
  SELECT oo.name AS GET_UsedTable_name,  
  ROW_NUMBER() OVER(partition by o.name, oo.name ORDER BY o.name, oo.name) AS ROW  
  FROM SYSDEPENDS d    
  INNER JOIN SYSOBJECTS o ON o.id=d.id  
  INNER JOIN SYSOBJECTS oo ON oo.id=d.depid  
  WHERE o.xtype = 'P' AND o.name LIKE '%SP_%' 
)
SELECT GET_UsedTable_name FROM GET_Procedures 
WHERE ROW = 1

--RESULT
GET_UsedTable_name
Students

-- List of Table Primary and Foreign Keys
 SELECT DISTINCT Constraint_Name AS [ConstraintName],
  Table_Schema AS [SchemaName], 
  Table_Name AS [TableName] 
 FROM INFORMATION_SCHEMA.KEY_COLUMN_USAGE  
 WHERE INFORMATION_SCHEMA.KEY_COLUMN_USAGE.TABLE_NAME='Students'
GO
-- RESULT
ConstraintName SchemaName TableName
PK_Students dbo         Students

--DISABLE ALL CONSTRAINTS OF A TABLE
ALTER TABLE Students NOCHECK CONSTRAINT ALL

--RESULT
Command(s) completed successfully.

--DISABLE ALL CONSTRAINTS OF ALL TABLES
EXEC SP_MSFOREACHTABLE 'ALTER TABLE? NOCHECK CONSTRAINT ALL' 

--RESULT
Command(s) completed successfully.

-- CHANGE DEFAULT LANGUAGE FOR SQL SERVER
GO
 EXEC SP_CONFIGURE 'DEFAULT LANGUAGE', 23;
GO
 RECONFIGURE WITH OVERRIDE;
GO

--RESULT
Configuration option 'default language' changed from 0 to 23. 
Run the RECONFIGURE statement to install.


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ANIL SINGH

Anil Singh is an author, tech blogger, and software programmer. Book writing, tech blogging is something do extra and Anil love doing it. For more detail, kindly refer to this link..
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