Cursor : Loop Tables

Cursor to loop tables.

I use this pattern a lot in DBA  scripts...

DECLARE @SQL NVARCHAR(1000)
DECLARE @input_schema VARCHAR(100)
DECLARE @input_table VARCHAR(100)
DECLARE @current_schema VARCHAR(100)
DECLARE @current_table VARCHAR(100)

SET @input_schema = null
SET @input_table = null

DECLARE tablecursor CURSOR FOR
  SELECT table_schema, table_name
  FROM   information_schema.TABLES
  WHERE  TABLE_TYPE = 'BASE TABLE'
    AND  (TABLE_SCHEMA = @input_schema OR (@input_schema = '' OR @input_schema is null))
    AND  (TABLE_NAME = @input_table OR (@input_table = '' OR @input_table is null))

OPEN tablecursor

FETCH NEXT FROM tablecursor INTO @current_schema, @current_table

WHILE @@FETCH_STATUS = 0
  BEGIN
      SET @SQL = 'EXEC add_to_table_queue '+ @current_schema + ' , ' + @current_table

      PRINT @SQL
      --EXEC Sp_executesql @SQL

      FETCH NEXT FROM tablecursor INTO @current_schema, @current_table
  END

CLOSE tablecursor
DEALLOCATE tablecursor 

SQL 2000 : Online & Offline databases

I can't believe I still need these in 2019...

-- SQL 2000 : Offline databases
select * from master..sysdatabases
where status & 512 = 512
and dbid > 4

-- SQL 2000 : Online databases
select * from master..sysdatabases
where status & 512 <> 512
and dbid > 4

TSQL : Loop a date range

Useful for Incremental processing...

DECLARE @minDate DATE
SET @minDate = '1997-02-13'
DECLARE @maxDate DATE
SET @maxDate = GETDATE()
 
DECLARE @Counter INT
DECLARE @CounterText VARCHAR(30)
DECLARE @counterDate DATE
DECLARE @counterDateText VARCHAR(30)
DECLARE @MinCount INT
DECLARE @Stepsize INT
 
DECLARE @stepstart DATETIME
DECLARE @stepend DATETIME
DECLARE @duration bigint
DECLARE @message varchar(200)

SELECT @Counter = DATEDIFF(dd,@minDate,@maxDate)
SELECT @MinCount = 0
SELECT @Stepsize = 1
 
WHILE @Counter >= @MinCount 
 
BEGIN
SET @CounterText = CONVERT(VARCHAR(30),@Counter,23)
--RAISERROR (@CounterText, 10, 1) WITH NOWAIT  
 
SET @counterDate = DATEADD(dd,-@counter,@maxDate)
SET @counterDateText = CONVERT(VARCHAR(30),@counterDate,120)

RAISERROR (@counterDateText, 10, 1) WITH NOWAIT  

SET @stepstart = GETDATE()


-- do useful stuff here
-- WAITFOR DELAY '00:00:01'

SET @stepend = GETDATE()

SET @duration = DATEDIFF(ss,@stepstart,@stepend)
SET @message = 'Took ' + CONVERT(varchar(20),@duration) + ' seconds'
RAISERROR (@message, 10, 1) WITH NOWAIT  

 
SELECT @Counter = @Counter - @Stepsize 
END