Query 1: How to Retrieve List of All Databases in SQL Server
The following SQL query retrieves a list of all databases on a SQL Server.
EXEC sp_helpdb
SQL
Example
Query 2: How to Display Text of a Stored Procedure, Trigger, or View in SQL Server
The following SQL query gets the display text of a stored procedure, trigger, or view on SQL Server.
exec sp_helptext @objname = 'Object_Name'
SQL
Example
Query 3: How to List All Stored Procedures in SQL Server
The following SQL query gets a list of all stored procedures in a SQL Server database.
SELECT DISTINCT o.name, o.xtype
FROM syscomments c
INNER JOIN sysobjects o ON c.id=o.id
WHERE o.xtype='P'
SQL
Example
To retrieve the View use “V” instead of “P” and for functions use “FN.
Query 4: How to Get All Stored Procedures Related To a Table in SQL Server
The following SQL query gets all stored procedures related to a database table in SQL Server.
SELECT DISTINCT o.name, o.xtype
FROM syscomments c
INNER JOIN sysobjects o ON c.id=o.id
WHERE c.TEXT LIKE '%Table_Name%' AND o.xtype='P'
SQL
Example
To retrieve the View use “V” instead of “P” and for functions use “FN.
Query 5: How to Rebuild All Indexes of a SQL Server Database
The following SQL query rebuilds all indexes of a SQL Server database.
EXEC sp_MSforeachtable @command1="print '?' DBCC DBREINDEX ('?', ' ', 80)"
GO
EXEC sp_updatestats
GO
SQL
Example
Query 6: How to Retrieve All dependencies of Stored Procedures in SQL Server
This query returns all object names that are being using in stored procedurs like tables, user define functions, another stored procedures and so on.
;WITH stored_procedures AS (
SELECT
oo.name AS table_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_NAme%' )
SELECT Table_name FROM stored_procedures
WHERE row = 1
SQL
Example
Query 7: How to Find Size of a Database Table in SQL Server
The following SQL query gets the size of a database table of a SQL Server database.
SELECT sob.name AS Table_Name,
SUM(sys.length) AS [Size_Table(Bytes)]
FROM sysobjects sob, syscolumns sys
WHERE sob.xtype='u' AND sys.id=sob.id
GROUP BY sob.name
SQL
Example
Query 8: How to get all tables that don’t have identity columns in SQL Server
The following SQL query gets all tables of a SQL Server database that don't have identity columns.
SELECT
TABLE_NAME FROM INFORMATION_SCHEMA.TABLES
where
Table_NAME NOT IN
(
SELECT DISTINCT c.TABLE_NAME FROM INFORMATION_SCHEMA.COLUMNS c
INNER
JOIN sys.identity_columns ic
on
(c.COLUMN_NAME=ic.NAME))
AND
TABLE_TYPE ='BASE TABLE'
SQL
Example
Query 9: How to List Primary Keys and Foreign Keys in a SQL Server Database
The following SQL query gets a list of all primary keys and foreign keys on a SQL Server database.
SELECT
DISTINCT
Constraint_Name AS [Constraint],
Table_Schema AS [Schema],
Table_Name AS [TableName] FROM INFORMATION_SCHEMA.KEY_COLUMN_USAGE
GO
SQL
Example
Query 10: List of Primary Key and Foreign Key for a particular table
SELECT
DISTINCT
Constraint_Name AS [Constraint],
Table_Schema AS [Schema],
Table_Name AS [TableName] FROM INFORMATION_SCHEMA.KEY_COLUMN_USAGE
WHERE INFORMATION_SCHEMA.KEY_COLUMN_USAGE.TABLE_NAME='Table_Name'
GO
SQL
Example
Query 11: RESEED Identity of all tables
EXEC sp_MSForEachTable '
IF OBJECTPROPERTY(object_id(''?''), ''TableHasIdentity'') = 1
DBCC CHECKIDENT (''?'', RESEED, 0)
SQL
Example
Query 12: List of tables with number of records
CREATE TABLE #Tab
(
Table_Name [varchar](max),
Total_Records int
);
EXEC sp_MSForEachTable @command1=' Insert Into #Tab(Table_Name, Total_Records) SELECT ''?'', COUNT(*) FROM ?'
SELECT * FROM #Tab t ORDER BY t.Total_Records DESC;
DROP TABLE #Tab;
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Example
Query 13: Get the version name of SQL Server
SELECT @@VERSION AS Version_Name
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Example
Query 14: Get Current Language of SQL Server
SELECT @@LANGUAGE AS Current_Language;
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Example
Query 15: Disable all constraints of a table
ALTER TABLE Table_Name NOCHECK CONSTRAINT ALL
SQL
Example
Query 16: Disable all constraints of all tables
EXEC sp_MSForEachTable 'ALTER TABLE ? NOCHECK CONSTRAINT ALL'
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Example
Query 17: Get Current Language Id
SELECT @@LANGID AS 'Language ID'
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Example
Query 18: Get precision level used by decimal and numeric as current set in Server
SELECT @@MAX_PRECISION AS 'MAX_PRECISION'
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Example
Query 19: Return Server Name of SQL Server
SELECT @@SERVERNAME AS 'Server_Name'
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Example
Query 20: Get name of register key under which SQL Server is running
SELECT @@SERVICENAME AS 'Service_Name'
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Example
Query 21: Get Session Id of current user process
SELECT @@SPID AS 'Session_Id'
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Example
Query 22: Get Current Value of TEXTSIZE option
SELECT @@TEXTSIZE AS 'Text_Size'
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Example
Query 23: Retrieve Free Space of Hard Disk
EXEC master..xp_fixeddrives
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example
Query 24: Disable a Particular Trigger
Syntax
ALTER TABLE Table_Name DISABLE TRIGGER Trigger_Name
SQL
Example
ALTER TABLE Employee DISABLE TRIGGER TR_Insert_Salary
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Query 25: Enable a Particular Trigger
Syntax
ALTER TABLE Table_Name ENABLE TRIGGER Trigger_Name
SQL
Example
ALTER TABLE Employee ENABLE TRIGGER TR_Insert_Salary
SQL
Query 26: Disable All Trigger of a table
We can disable and enable all triggers of a table using previous query, but replacing the "ALL" instead of trigger name.
Syntax
ALTER TABLE Table_Name DISABLE TRIGGER ALL
SQL
Example
ALTER TABLE Demo DISABLE TRIGGER ALL
SQL
Query 27: Enable All Trigger of a table
ALTER TABLE Table_Name ENABLE TRIGGER ALL
SQL
Example
ALTER TABLE Demo ENABLE TRIGGER ALL
SQL
Query 28: Disable All Trigger for database
Using sp_msforeachtable system stored procedure we enable and disable all triggers for a database.
Syntax
Use Database_Name
Exec sp_msforeachtable "ALTER TABLE ? DISABLE TRIGGER all"
SQL
Example
example
Query 29: Enable All Trigger for database
Use Demo
Exec sp_msforeachtable "ALTER TABLE ? ENABLE TRIGGER all"
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example
Query 30: List of Stored procedure modified in last N days
SELECT name,modify_date
FROM sys.objects
WHERE type='P'
AND DATEDIFF(D,modify_date,GETDATE())< N
SQL
example
Query 31: List of Stored procedure created in last N days
SELECT name,sys.objects.create_date
FROM sys.objects
WHERE type='P'
AND DATEDIFF(D,sys.objects.create_date,GETDATE())< N
SQL
Example
Query 32: Recompile a stored procedure
EXEC sp_recompile'Procedure_Name';
GO
SQL
Example
Query 33: Recompile all stored procedure on a table
EXEC sp_recompile N'Table_Name';
GO
SQL
Example
Query 34: Get all columns of a specific data type
SELECT OBJECT_NAME(c.OBJECT_ID) as Table_Name, c.name as Column_Name
FROM sys.columns AS c
JOIN sys.types AS t ON c.user_type_id=t.user_type_id
WHERE t.name = 'Data_Type'
SQL
Example
Query 35: Get all Nullable columns of a table
SELECT OBJECT_NAME(c.OBJECT_ID) as Table_Name, c.name as Column_Name
FROM sys.columns AS c
JOIN sys.types AS t ON c.user_type_id=t.user_type_id
WHERE c.is_nullable=0 AND OBJECT_NAME(c.OBJECT_ID)='Table_Name'
SQL
Example
Query 36: Get All table that don’t have primary key
SELECT name AS Table_Name
FROM sys.tables
WHERE OBJECTPROPERTY(OBJECT_ID,'TableHasPrimaryKey') = 0
ORDER BY Table_Name;
SQL
Example
Query 37: Get All table that don’t have foreign key
SELECT name AS Table_Name
FROM sys.tables
WHERE OBJECTPROPERTY(OBJECT_ID,'TableHasForeignKey') = 0
ORDER BY Table_Name;
SQL
Example
Query 38: Get All table that don’t have identity column
SELECT name AS Table_Name
FROM sys.tables
WHERE OBJECTPROPERTY(OBJECT_ID,'TableHasIdentity') = 0
ORDER BY Table_Name;
SQL
Example
Query 39: Get First Date of Current Month
SELECT CONVERT(VARCHAR(25),DATEADD(DAY,-(DAY(GETDATE()))+1,GETDATE()),105) First_Date_Current_Month;
SQL
Example
Query 40: Get last date of previous month
SELECT CONVERT(VARCHAR(25),DATEADD(DAY,-(DAY(GETDATE())),GETDATE()),105) Last_Date_Previous_Month;
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Example
Query 41: Get last date of current month
SELECT CONVERT(VARCHAR(25),DATEADD(DAY,-(DAY(GETDATE())), DATEADD(MONTH,1,GETDATE())),105) Last_Date_Current_Month;
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Example
Query 42: Get first date of next month
SELECT CONVERT(VARCHAR(25),DATEADD(DAY,-(DAY(GETDATE())), DATEADD(MONTH,1,GETDATE())+1),105) First_Date_Next_Month;
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Example
Query 43: Swap the values of two columns
UPDATE Table_Name SET Column1=Column2, Column2=Column1
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Example
Query 44: Remove all stored procedure from database
Declare @Drop_SP Nvarchar(MAX)
Declare My_Cursor Cursor For Select [name] From sys.objects where type = 'p'
Open My_Cursor
Fetch Next From My_Cursor Into @Drop_SP
While @@FETCH_STATUS= 0
Begin
Exec('DROP PROCEDURE ' + @Drop_SP)
Fetch Next From My_Cursor Into @Drop_SP
End
Close My_Cursor
Deallocate My_Cursor
SQL
Example
Query 45: Remove all views from database
Declare @Drop_View Nvarchar(MAX)
Declare My_Cursor Cursor For Select [name] From sys.objects where type = 'v'
Open My_Cursor
Fetch Next From My_Cursor Into @Drop_View
While @@FETCH_STATUS = 0
Begin
Exec('DROP VIEW ' + @Drop_View)
Fetch Next From My_Cursor Into @Drop_View
End
Close My_Cursor
Deallocate My_Cursor
SQL
Example
Query 46: Drop all tables
EXEC sys.sp_MSforeachtable @command1 = 'Drop Table ?'
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Example
Query 47: Get information of tables’ columns
SELECT * FROM INFORMATION_SCHEMA.COLUMNS
WHERE INFORMATION_SCHEMA.COLUMNS.TABLE_NAME=’Table_Name’
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Example
Query 48: Get all columns contain any constraints
SELECT TABLE_NAME,COLUMN_NAME,CONSTRAINT_NAME FROM INFORMATION_SCHEMA.CONSTRAINT_COLUMN_USAGE
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Example
Query 49: Get all tables that contain a view
SELECT * FROM INFORMATION_SCHEMA.VIEW_TABLE_USAGE
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Example
Query 50: Get all columns of table that using in views
SELECT * FROM INFORMATION_SCHEMA.VIEW_COLUMN_USAGE
SQL
Example
https://www.c-sharpcorner.com/article/50-important-queries-in-sql-server/
Query 1: How to Retrieve List of All Databases in SQL Server
The following SQL query retrieves a list of all databases on a SQL Server.
EXEC sp_helpdb
Query 2: How to Display Text of a Stored Procedure, Trigger, or View in SQL Server
The following SQL query gets the display text of a stored procedure, trigger, or view on SQL Server.
exec sp_helptext @objname = 'Object_Name'
Query 3: How to List All Stored Procedures in SQL Server
The following SQL query gets a list of all stored procedures in a SQL Server database.
SELECT DISTINCT o.name, o.xtype
FROM syscomments c
INNER JOIN sysobjects o ON c.id=o.id
WHERE o.xtype='P'
To retrieve the View use “V” instead of “P” and for functions use “FN.
Query 4: How to Get All Stored Procedures Related To a Table in SQL Server
The following SQL query gets all stored procedures related to a database table in SQL Server.
SELECT DISTINCT o.name, o.xtype
FROM syscomments c
INNER JOIN sysobjects o ON c.id=o.id
WHERE c.TEXT LIKE '%Table_Name%' AND o.xtype='P'
To retrieve the View use “V” instead of “P” and for functions use “FN.
Query 5: How to Rebuild All Indexes of a SQL Server Database
The following SQL query rebuilds all indexes of a SQL Server database.
EXEC sp_MSforeachtable @command1="print '?' DBCC DBREINDEX ('?', ' ', 80)"
GO
EXEC sp_updatestats
GO
Query 6: How to Retrieve All dependencies of Stored Procedures in SQL Server
This query returns all object names that are being using in stored procedurs like tables, user define functions, another stored procedures and so on.
;WITH stored_procedures AS (
SELECT
oo.name AS table_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_NAme%' )
SELECT Table_name FROM stored_procedures
WHERE row = 1
Query 7: How to Find Size of a Database Table in SQL Server
The following SQL query gets the size of a database table of a SQL Server database.
SELECT sob.name AS Table_Name,
SUM(sys.length) AS [Size_Table(Bytes)]
FROM sysobjects sob, syscolumns sys
WHERE sob.xtype='u' AND sys.id=sob.id
GROUP BY sob.name
Query 8: How to get all tables that don’t have identity columns in SQL Server
The following SQL query gets all tables of a SQL Server database that don't have identity columns.
SELECT
TABLE_NAME FROM INFORMATION_SCHEMA.TABLES
where
Table_NAME NOT IN
(
SELECT DISTINCT c.TABLE_NAME FROM INFORMATION_SCHEMA.COLUMNS c
INNER
JOIN sys.identity_columns ic
on
(c.COLUMN_NAME=ic.NAME))
AND
TABLE_TYPE ='BASE TABLE'
Query 9: How to List Primary Keys and Foreign Keys in a SQL Server Database
The following SQL query gets a list of all primary keys and foreign keys on a SQL Server database.
SELECT
DISTINCT
Constraint_Name AS [Constraint],
Table_Schema AS [Schema],
Table_Name AS [TableName] FROM INFORMATION_SCHEMA.KEY_COLUMN_USAGE
GO
Query 10: List of Primary Key and Foreign Key for a particular table
SELECT
DISTINCT
Constraint_Name AS [Constraint],
Table_Schema AS [Schema],
Table_Name AS [TableName] FROM INFORMATION_SCHEMA.KEY_COLUMN_USAGE
WHERE INFORMATION_SCHEMA.KEY_COLUMN_USAGE.TABLE_NAME='Table_Name'
GO
Query 11: RESEED Identity of all tables
EXEC sp_MSForEachTable '
IF OBJECTPROPERTY(object_id(''?''), ''TableHasIdentity'') = 1
DBCC CHECKIDENT (''?'', RESEED, 0)
Query 12: List of tables with number of records
CREATE TABLE #Tab
(
Table_Name [varchar](max),
Total_Records int
);
EXEC sp_MSForEachTable @command1=' Insert Into #Tab(Table_Name, Total_Records) SELECT ''?'', COUNT(*) FROM ?'
SELECT * FROM #Tab t ORDER BY t.Total_Records DESC;
DROP TABLE #Tab;
Query 13: Get the version name of SQL Server
SELECT @@VERSION AS Version_Name
Query 14: Get Current Language of SQL Server
SELECT @@LANGUAGE AS Current_Language;
Query 15: Disable all constraints of a table
ALTER TABLE Table_Name NOCHECK CONSTRAINT ALL
Query 16: Disable all constraints of all tables
EXEC sp_MSForEachTable 'ALTER TABLE ? NOCHECK CONSTRAINT ALL'
Query 17: Get Current Language Id
SELECT @@LANGID AS 'Language ID'
Query 18: Get precision level used by decimal and numeric as current set in Server
SELECT @@MAX_PRECISION AS 'MAX_PRECISION'
Query 19: Return Server Name of SQL Server
SELECT @@SERVERNAME AS 'Server_Name'
Query 20: Get name of register key under which SQL Server is running
SELECT @@SERVICENAME AS 'Service_Name'
Query 21: Get Session Id of current user process
SELECT @@SPID AS 'Session_Id'
Query 22: Get Current Value of TEXTSIZE option
SELECT @@TEXTSIZE AS 'Text_Size'
Query 23: Retrieve Free Space of Hard Disk
EXEC master..xp_fixeddrives
Query 24: Disable a Particular Trigger
Syntax
ALTER TABLE Table_Name DISABLE TRIGGER Trigger_NameExample
ALTER TABLE Employee DISABLE TRIGGER TR_Insert_SalaryQuery 25: Enable a Particular Trigger
Syntax
ALTER TABLE Table_Name ENABLE TRIGGER Trigger_NameExample
ALTER TABLE Employee ENABLE TRIGGER TR_Insert_SalaryQuery 26: Disable All Trigger of a table
We can disable and enable all triggers of a table using previous query, but replacing the "ALL" instead of trigger name.
Syntax
ALTER TABLE Table_Name DISABLE TRIGGER ALLExample
ALTER TABLE Demo DISABLE TRIGGER ALL
Query 27: Enable All Trigger of a table
ALTER TABLE Table_Name ENABLE TRIGGER ALLExample
ALTER TABLE Demo ENABLE TRIGGER ALL
Query 28: Disable All Trigger for database
Using sp_msforeachtable system stored procedure we enable and disable all triggers for a database.
Syntax
Use Database_Name
Exec sp_msforeachtable "ALTER TABLE ? DISABLE TRIGGER all"
Example
Query 29: Enable All Trigger for database
Use Demo
Exec sp_msforeachtable "ALTER TABLE ? ENABLE TRIGGER all"
Query 30: List of Stored procedure modified in last N days
SELECT name,modify_date
FROM sys.objects
WHERE type='P'
AND DATEDIFF(D,modify_date,GETDATE())< N
Query 31: List of Stored procedure created in last N days
SELECT name,sys.objects.create_date
FROM sys.objects
WHERE type='P'
AND DATEDIFF(D,sys.objects.create_date,GETDATE())< N
Query 32: Recompile a stored procedure
EXEC sp_recompile'Procedure_Name';
GO
Query 33: Recompile all stored procedure on a table
EXEC sp_recompile N'Table_Name';
GO
Query 34: Get all columns of a specific data type
SELECT OBJECT_NAME(c.OBJECT_ID) as Table_Name, c.name as Column_Name
FROM sys.columns AS c
JOIN sys.types AS t ON c.user_type_id=t.user_type_id
WHERE t.name = 'Data_Type'
Query 35: Get all Nullable columns of a table
SELECT OBJECT_NAME(c.OBJECT_ID) as Table_Name, c.name as Column_Name
FROM sys.columns AS c
JOIN sys.types AS t ON c.user_type_id=t.user_type_id
WHERE c.is_nullable=0 AND OBJECT_NAME(c.OBJECT_ID)='Table_Name'
Query 36: Get All table that don’t have primary key
SELECT name AS Table_Name
FROM sys.tables
WHERE OBJECTPROPERTY(OBJECT_ID,'TableHasPrimaryKey') = 0
ORDER BY Table_Name;
Query 37: Get All table that don’t have foreign key
SELECT name AS Table_Name
FROM sys.tables
WHERE OBJECTPROPERTY(OBJECT_ID,'TableHasForeignKey') = 0
ORDER BY Table_Name;
Query 38: Get All table that don’t have identity column
SELECT name AS Table_Name
FROM sys.tables
WHERE OBJECTPROPERTY(OBJECT_ID,'TableHasIdentity') = 0
ORDER BY Table_Name;
Query 39: Get First Date of Current Month
SELECT CONVERT(VARCHAR(25),DATEADD(DAY,-(DAY(GETDATE()))+1,GETDATE()),105) First_Date_Current_Month;
Query 40: Get last date of previous month
SELECT CONVERT(VARCHAR(25),DATEADD(DAY,-(DAY(GETDATE())),GETDATE()),105) Last_Date_Previous_Month;
Query 41: Get last date of current month
SELECT CONVERT(VARCHAR(25),DATEADD(DAY,-(DAY(GETDATE())), DATEADD(MONTH,1,GETDATE())),105) Last_Date_Current_Month;
Query 42: Get first date of next month
SELECT CONVERT(VARCHAR(25),DATEADD(DAY,-(DAY(GETDATE())), DATEADD(MONTH,1,GETDATE())+1),105) First_Date_Next_Month;
Query 43: Swap the values of two columns
UPDATE Table_Name SET Column1=Column2, Column2=Column1
Query 44: Remove all stored procedure from database
Declare @Drop_SP Nvarchar(MAX)
Declare My_Cursor Cursor For Select [name] From sys.objects where type = 'p'
Open My_Cursor
Fetch Next From My_Cursor Into @Drop_SP
While @@FETCH_STATUS= 0
Begin
Exec('DROP PROCEDURE ' + @Drop_SP)
Fetch Next From My_Cursor Into @Drop_SP
End
Close My_Cursor
Deallocate My_Cursor
Query 45: Remove all views from database
Declare @Drop_View Nvarchar(MAX)
Declare My_Cursor Cursor For Select [name] From sys.objects where type = 'v'
Open My_Cursor
Fetch Next From My_Cursor Into @Drop_View
While @@FETCH_STATUS = 0
Begin
Exec('DROP VIEW ' + @Drop_View)
Fetch Next From My_Cursor Into @Drop_View
End
Close My_Cursor
Deallocate My_Cursor
Query 46: Drop all tables
EXEC sys.sp_MSforeachtable @command1 = 'Drop Table ?'
Query 47: Get information of tables’ columns
SELECT * FROM INFORMATION_SCHEMA.COLUMNS
WHERE INFORMATION_SCHEMA.COLUMNS.TABLE_NAME=’Table_Name’
Query 48: Get all columns contain any constraints
SELECT TABLE_NAME,COLUMN_NAME,CONSTRAINT_NAME FROM INFORMATION_SCHEMA.CONSTRAINT_COLUMN_USAGE
Query 49: Get all tables that contain a view
SELECT * FROM INFORMATION_SCHEMA.VIEW_TABLE_USAGE
Query 50: Get all columns of table that using in views
SELECT * FROM INFORMATION_SCHEMA.VIEW_COLUMN_USAGE
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