lockworld
7/10/2017 - 5:32 PM

Handy T-SQL Commands

Handy T-SQL Commands

--Convert a date and a time into a datetime:
--where @SysTime and @Date are the db fields you want to convert
CAST(DATEADD(ms, @SysTime * 1000, 0) AS datetime) + CAST(@Date AS datetime)

DECLARE @sp_who2 table
(
      [SPID] varchar(20),
      [Status] varchar(50),
      [Login] varchar(100),
      [HostName] varchar(100),
      [BlockedBy] varchar(20),
      [DBName] varchar(50),
      [Command] varchar (100),
      [CPUTime] varchar(25),
      [DiskIO] varchar(25),
      [LastBatch] varchar(20),
      [ProgramName] varchar(100),
      [SPID2] varchar(20),
      [REQUESTID] varchar(20)
      
)

INSERT INTO @sp_who2
exec sp_who2

SELECT GETDATE()as RunDateTime, * from @sp_who2
WHERE RTRIM([Status]) in ('RUNNABLE', 'SUSPENDED')
--https://stackoverflow.com/a/32980415
select t.name, s.row_count
from sys.tables t
join sys.dm_db_partition_stats s
  ON t.object_id = s.object_id
    and t.type_desc = 'USER_TABLE'
    and t.name not like '%dss%'
    and s.index_id = 1
SELECT
  CASE	
		WHEN ISNUMERIC(varchar_field)=1 
			THEN str(CAST(varchar_field AS float),30,30)
		ELSE varchar_field
	END AS numeric_sorted_varchar_field


--EXAMPLE
-- Not fully functional...problems with float conversion precision
DECLARE @is TABLE(
	val varchar(30)
)
INSERT INTO @is
(val)
VALUES
('0.00'), ('0'), ('0.00'), ('0.10'), ('0.15'), ('0.2'), ('1'), ('1.0'), ('1.1'), ('1.15'), ('1.2'), ('1.20'), ('15.0'), ('15'), ('15.1123'), ('20'), ('21.0'), ('22.351'), ('3'), ('30.12'),(''),('low'),('high'),('1132262.1')


SELECT 
	CAST(
	CASE	
		WHEN ISNUMERIC(val)=1 
			THEN STR(CAST(val AS float), 30,30)
		ELSE val
	END AS VARCHAR(30)) AS i
FROM @is
ORDER BY i

T-SQL Syntax Samples

select *
from INFORMATION_SCHEMA.COLUMNS
where TABLE_NAME='YourTableName'
/*
Problems with collation affect equality
ERROR: Cannot resolve the collation conflict between "SQL_Latin1_General_CP1_CI_AS" and "Latin1_General_CI_AS" in the equal to operation.


Reference: https://stackoverflow.com/questions/1404880/sql-collation-conflict-when-comparing-to-a-column-in-a-temp-table
*/


SELECT  *
FROM    my_table
INNER JOIN
        @TempTable tem
ON      my_table.id = temp.id COLLATE SQL_Latin1_General_CP1_CI_AS
        AND my_table.key = 'SOME STRING'
        
-- OR

CREATE TABLE @TempTable (ID NVARCHAR(255) COLLATE database_default)
SELECT
    db.name AS DBName,
    type_desc AS FileType,
    Physical_Name AS Location
FROM
    sys.master_files mf
INNER JOIN 
    sys.databases db ON db.database_id = mf.database_id
/* Count how many times a value is repeated in a table */

SELECT  Key1, 
        COUNT(Key1) AS Total, 
        (SELECT COUNT(*) FROM MyTable) AS Records, 
        (COUNT(Key1) * 1.0 / (SELECT COUNT(*) FROM MyTable) * 1.0) AS Pct
FROM    MyTable 
GROUP   BY Key1
ORDER BY (COUNT(Key1) * 1.0 / (SELECT COUNT(*) FROM MyTable) * 1.0) DESC
/*This converts {DateFiel} and {TimeField} to a DateTme format*/
SELECT (DATEADD(s, {TimeField}, CAST({DateField} AS DateTime))) AS Timestamp, * FROM MyTable
/*
Read: https://support.microsoft.com/en-us/help/918992/how-to-transfer-logins-and-passwords-between-instances-of-sql-server
*/
USE master
GO
IF OBJECT_ID ('sp_hexadecimal') IS NOT NULL
  DROP PROCEDURE sp_hexadecimal
GO
CREATE PROCEDURE sp_hexadecimal
    @binvalue varbinary(256),
    @hexvalue varchar (514) OUTPUT
AS
DECLARE @charvalue varchar (514)
DECLARE @i int
DECLARE @length int
DECLARE @hexstring char(16)
SELECT @charvalue = '0x'
SELECT @i = 1
SELECT @length = DATALENGTH (@binvalue)
SELECT @hexstring = '0123456789ABCDEF'
WHILE (@i <= @length)
BEGIN
  DECLARE @tempint int
  DECLARE @firstint int
  DECLARE @secondint int
  SELECT @tempint = CONVERT(int, SUBSTRING(@binvalue,@i,1))
  SELECT @firstint = FLOOR(@tempint/16)
  SELECT @secondint = @tempint - (@firstint*16)
  SELECT @charvalue = @charvalue +
    SUBSTRING(@hexstring, @firstint+1, 1) +
    SUBSTRING(@hexstring, @secondint+1, 1)
  SELECT @i = @i + 1
END

SELECT @hexvalue = @charvalue
GO
 
IF OBJECT_ID ('sp_help_revlogin') IS NOT NULL
  DROP PROCEDURE sp_help_revlogin
GO
CREATE PROCEDURE sp_help_revlogin @login_name sysname = NULL AS
DECLARE @name sysname
DECLARE @type varchar (1)
DECLARE @hasaccess int
DECLARE @denylogin int
DECLARE @is_disabled int
DECLARE @PWD_varbinary  varbinary (256)
DECLARE @PWD_string  varchar (514)
DECLARE @SID_varbinary varbinary (85)
DECLARE @SID_string varchar (514)
DECLARE @tmpstr  varchar (1024)
DECLARE @is_policy_checked varchar (3)
DECLARE @is_expiration_checked varchar (3)

DECLARE @defaultdb sysname
 
IF (@login_name IS NULL)
  DECLARE login_curs CURSOR FOR

      SELECT p.sid, p.name, p.type, p.is_disabled, p.default_database_name, l.hasaccess, l.denylogin FROM 
sys.server_principals p LEFT JOIN sys.syslogins l
      ON ( l.name = p.name ) WHERE p.type IN ( 'S', 'G', 'U' ) AND p.name <> 'sa'
ELSE
  DECLARE login_curs CURSOR FOR


      SELECT p.sid, p.name, p.type, p.is_disabled, p.default_database_name, l.hasaccess, l.denylogin FROM 
sys.server_principals p LEFT JOIN sys.syslogins l
      ON ( l.name = p.name ) WHERE p.type IN ( 'S', 'G', 'U' ) AND p.name = @login_name
OPEN login_curs

FETCH NEXT FROM login_curs INTO @SID_varbinary, @name, @type, @is_disabled, @defaultdb, @hasaccess, @denylogin
IF (@@fetch_status = -1)
BEGIN
  PRINT 'No login(s) found.'
  CLOSE login_curs
  DEALLOCATE login_curs
  RETURN -1
END
SET @tmpstr = '/* sp_help_revlogin script '
PRINT @tmpstr
SET @tmpstr = '** Generated ' + CONVERT (varchar, GETDATE()) + ' on ' + @@SERVERNAME + ' */'
PRINT @tmpstr
PRINT ''
WHILE (@@fetch_status <> -1)
BEGIN
  IF (@@fetch_status <> -2)
  BEGIN
    PRINT ''
    SET @tmpstr = '-- Login: ' + @name
    PRINT @tmpstr
    IF (@type IN ( 'G', 'U'))
    BEGIN -- NT authenticated account/group

      SET @tmpstr = 'CREATE LOGIN ' + QUOTENAME( @name ) + ' FROM WINDOWS WITH DEFAULT_DATABASE = [' + @defaultdb + ']'
    END
    ELSE BEGIN -- SQL Server authentication
        -- obtain password and sid
            SET @PWD_varbinary = CAST( LOGINPROPERTY( @name, 'PasswordHash' ) AS varbinary (256) )
        EXEC sp_hexadecimal @PWD_varbinary, @PWD_string OUT
        EXEC sp_hexadecimal @SID_varbinary,@SID_string OUT
 
        -- obtain password policy state
        SELECT @is_policy_checked = CASE is_policy_checked WHEN 1 THEN 'ON' WHEN 0 THEN 'OFF' ELSE NULL END FROM sys.sql_logins WHERE name = @name
        SELECT @is_expiration_checked = CASE is_expiration_checked WHEN 1 THEN 'ON' WHEN 0 THEN 'OFF' ELSE NULL END FROM sys.sql_logins WHERE name = @name
 
            SET @tmpstr = 'CREATE LOGIN ' + QUOTENAME( @name ) + ' WITH PASSWORD = ' + @PWD_string + ' HASHED, SID = ' + @SID_string + ', DEFAULT_DATABASE = [' + @defaultdb + ']'

        IF ( @is_policy_checked IS NOT NULL )
        BEGIN
          SET @tmpstr = @tmpstr + ', CHECK_POLICY = ' + @is_policy_checked
        END
        IF ( @is_expiration_checked IS NOT NULL )
        BEGIN
          SET @tmpstr = @tmpstr + ', CHECK_EXPIRATION = ' + @is_expiration_checked
        END
    END
    IF (@denylogin = 1)
    BEGIN -- login is denied access
      SET @tmpstr = @tmpstr + '; DENY CONNECT SQL TO ' + QUOTENAME( @name )
    END
    ELSE IF (@hasaccess = 0)
    BEGIN -- login exists but does not have access
      SET @tmpstr = @tmpstr + '; REVOKE CONNECT SQL TO ' + QUOTENAME( @name )
    END
    IF (@is_disabled = 1)
    BEGIN -- login is disabled
      SET @tmpstr = @tmpstr + '; ALTER LOGIN ' + QUOTENAME( @name ) + ' DISABLE'
    END
    PRINT @tmpstr
  END

  FETCH NEXT FROM login_curs INTO @SID_varbinary, @name, @type, @is_disabled, @defaultdb, @hasaccess, @denylogin
   END
CLOSE login_curs
DEALLOCATE login_curs
RETURN 0
GO
--Declare variables to hold values for each iteration
DECLARE @field1 nvarchar(50), @field2 nvarchar(50), @field3 nvarchar(50)

--Declare cursor for a select statement
DECLARE cur CURSOR FOR
SELECT [Field1]
	  ,[Field2]
      ,[Field3]
  FROM [Table1]
  WHERE [Field4]='SomeValue'

--Open cursor for use
OPEN cur

--Get the first line from the cursor and place the values into declared variables
FETCH NEXT FROM cur INTO @field1, @field2, @field3
WHILE (@@fetch_status <> -1)
BEGIN
	--Perform action based on current line's variables
	INSERT INTO [Table2]
	(Field1, Field2, Field3, Field4)
	VALUES
	(@field1, @field2, @field3, 'OtherValue')

	--!IMPORTANT!
	--Iterate to the next line in the cursor
	FETCH NEXT FROM cur INTO @field1, @field2, @field3
END

--Close and deallocate cursor
CLOSE cur
DEALLOCATE cur