Databases – SQLpowered.com

Drop all foreign keys in database (WHILE version)

Jan Dvořák — Tue, 18 Jun 2019 13:51:23 +0000

SET TRANSACTION ISOLATION LEVEL READ UNCOMMITTED
SET NOCOUNT ON
GO

DECLARE @SchemaName NVARCHAR(128)
DECLARE @TableName NVARCHAR(128)
DECLARE @ConstraintName NVARCHAR(128)
DECLARE @Stmt NVARCHAR(MAX)
DECLARE @FKsToDel TABLE ([SchemaName] NVARCHAR(128) NOT NULL,
[TableName] NVARCHAR(128),
[ConstraintName] NVARCHAR(128),
PRIMARY KEY ([SchemaName], [TableName], [ConstraintName]))

INSERT INTO @FKsToDel
( [SchemaName], [TableName], [ConstraintName] )
SELECT [s].[name], [t].[name], [c].[name]
FROM [sys].[objects] AS [c]
INNER JOIN [sys].[tables] AS [t] ON [c].[parent_object_id] = [t].[object_id]
INNER JOIN [sys].[schemas] AS [s] ON [t].[schema_id] = [s].[schema_id]
WHERE [c].[type] IN ('F') AND [s].[name] IN (/*Fill list*/)

WHILE EXISTS (SELECT * FROM @FKsToDel)
BEGIN

SELECT TOP(1)
@SchemaName = [SchemaName],
@TableName = [TableName],
@ConstraintName = [ConstraintName]
FROM @FKsToDel
ORDER BY [SchemaName], [TableName], [ConstraintName]

PRINT 'ALTER TABLE ' + QUOTENAME(@SchemaName) + N'.' + QUOTENAME(@TableName) +
N' DROP CONSTRAINT ' + QUOTENAME(@ConstraintName) + ';' + CHAR(13) + 'GO'

DELETE FROM @FKsToDel WHERE [SchemaName] = @SchemaName AND [TableName] = @TableName AND [ConstraintName] = @ConstraintName

END
GO

Drop all tables in database (WHILE version)

Jan Dvořák — Tue, 18 Jun 2019 13:50:47 +0000

SET TRANSACTION ISOLATION LEVEL READ UNCOMMITTED
SET NOCOUNT ON
GO

DECLARE @SchemaName NVARCHAR(128)
DECLARE @TableName NVARCHAR(128)
DECLARE @Stmt NVARCHAR(MAX)

DECLARE @TablesToDel TABLE ([SchemaName] NVARCHAR(128) NOT NULL,
							[TableName] NVARCHAR(128),
						    PRIMARY KEY ([SchemaName], [TableName]))

INSERT INTO @TablesToDel 
	( [SchemaName], [TableName])
SELECT [s].[name], [t].[name]
FROM [sys].[tables] AS [t] 
	INNER JOIN [sys].[schemas] AS [s]  ON [t].[schema_id] = [s].[schema_id]
WHERE [t].[type] IN ('U') AND [s].[name] IN (/*Fill list*/)
		
WHILE EXISTS (SELECT * FROM @TablesToDel)
BEGIN
    
	SELECT TOP(1)
		@SchemaName = [SchemaName],
		@TableName = [TableName]
	FROM @TablesToDel [td]
	ORDER BY [SchemaName], [td].[TableName]

	PRINT 'DROP TABLE ' + QUOTENAME(@SchemaName) + N'.' + QUOTENAME(@TableName) + ';' + CHAR(13) + 'GO'

	DELETE FROM @TablesToDel WHERE [SchemaName] = @SchemaName AND [TableName] = @TableName

END
GO

Drop all schemas in database (WHILE version)

Jan Dvořák — Tue, 18 Jun 2019 13:49:52 +0000

SET TRANSACTION ISOLATION LEVEL READ UNCOMMITTED
SET NOCOUNT ON
GO

DECLARE @SchemaName NVARCHAR(128)
DECLARE @Stmt NVARCHAR(MAX)

DECLARE @SchemasToDel TABLE ([SchemaName] NVARCHAR(128) NOT NULL PRIMARY KEY)

INSERT INTO @SchemasToDel 
	( [SchemaName] )
SELECT [s].[name]
FROM [sys].[schemas] [s]
WHERE [s].[name] IN (/*Fill list*/)

WHILE EXISTS (SELECT * FROM @SchemasToDel)
BEGIN
    
	SELECT TOP(1)
		@SchemaName = [SchemaName]
	FROM @SchemasToDel
	ORDER BY [SchemaName]

	PRINT 'DROP SCHEMA ' + QUOTENAME(@SchemaName) + ';' + CHAR(13) + 'GO'

	DELETE FROM @SchemasToDel WHERE [SchemaName] = @SchemaName

END
GO

Switch database to single user mode

Jan Dvořák — Fri, 09 Mar 2018 14:08:05 +0000

EXEC [sp_dboption] 'MyDatabase', 'single user', 'TRUE'
EXEC [sp_dboption] -- display list of all avaiable options
EXEC [sp_dboption] 'MyDatabase' -- display list of options set to 1
EXEC [sp_dboption] 'MyDatabase', 'single user' -- display actual option setting
GO

Drop all tables in database

Jan Dvořák — Fri, 09 Mar 2018 14:04:51 +0000

DECLARE @Stmt NVARCHAR(MAX) = ''

SELECT 
	@Stmt = @Stmt + 'DROP TABLE [' + SCHEMA_NAME(t.schema_id) + '].[' + t.name + '];'
FROM sys.[tables] t
WHERE t.[type] = 'U'

EXECUTE(@Stmt)
GO

Compress all tables and indexes in database

Jan Dvořák — Fri, 09 Mar 2018 13:54:01 +0000

-- tables 
EXEC sp_MSForEachTable 'ALTER TABLE ? REBUILD PARTITION = ALL WITH (DATA_COMPRESSION = PAGE)' 
GO 

-- indexes 
EXEC sp_MSForEachTable 'ALTER INDEX ALL ON ? REBUILD PARTITION = ALL WITH (DATA_COMPRESSION = PAGE )' 
GO

SELECT 
'ALTER TABLE ' + QUOTENAME([s].[name]) + '.' + QUOTENAME([t].[name]) + ' REBUILD PARTITION = ALL WITH (DATA_COMPRESSION = PAGE)'
FROM [sys].[tables] [t]
INNER JOIN [sys].[schemas] [s] ON [s].[schema_id] = [t].[schema_id]
WHERE [s].[name] = ?
ORDER BY [s].[name], [t].[name]

Kill all sessions using database

Jan Dvořák — Fri, 09 Mar 2018 13:23:06 +0000

DECLARE @Stmt VARCHAR(1000)
SET @Stmt = ''    

SELECT @Stmt = @Stmt + 'KILL ' + CONVERT(NVARCHAR(3), [spid]) + '; '  
FROM [master].[dbo].[sysprocesses]   
WHERE DB_NAME([dbid]) = 'TestDb' AND [dbid] <> 0 AND spid <> @@spid   

EXECUTE(@Stmt)
GO