Mar 1, 2007

Insert Rows Generator

This stored proc is used to generate INSERT STATEMENTS for inserting rows into a Table:

CREATE PROC sp_InsertGenerator
(@tableName varchar(100)) as
--Declare a cursor to retrieve column specific information for the specified table
DECLARE cursCol CURSOR FAST_FORWARD FOR
SELECT column_name,data_type FROM information_schema.columns WHERE table_name = @tableName
OPEN cursCol
DECLARE @string nvarchar(4000) --for storing the first half of INSERT statement
DECLARE @stringData nvarchar(4000) --for storing the data (VALUES) related statement
DECLARE @dataType nvarchar(1000) --data types returned for respective columns
SET @string='INSERT '+@tableName+'('
SET @stringData=''
DECLARE @colName nvarchar(50)
FETCH NEXT FROM cursCol INTO @colName,@dataType
IF @@fetch_status<>0
begin
print 'Table '+@tableName+' not found, processing skipped.'
close curscol
deallocate curscol
return
END
WHILE @@FETCH_STATUS=0
BEGIN
IF @dataType in ('varchar','char','nchar','nvarchar')
BEGIN
SET @stringData=@stringData+'''''''''+isnull('+@colName+','''')+'''''',''+'
END
ELSE
if @dataType in ('text','ntext') --if the datatype is text or something else
BEGIN
SET @stringData=@stringData+'''''''''+isnull(cast('+@colName+' as varchar(2000)),'''')+'''''',''+'
END
ELSE
IF @dataType = 'money' --because money doesn't get converted from varchar implicitly
BEGIN
SET @stringData=@stringData+'''convert(money,''''''+isnull(cast('+@colName+' as varchar(200)),''0.0000'')+''''''),''+'
END
ELSE
IF @dataType='datetime'
BEGIN
SET @stringData=@stringData+'''convert(datetime,''''''+isnull(cast('+@colName+' as varchar(200)),''0'')+''''''),''+'
END
ELSE
IF @dataType='image'
BEGIN
SET @stringData=@stringData+'''''''''+isnull(cast(convert(varbinary,'+@colName+') as varchar(6)),''0'')+'''''',''+'
END
ELSE --presuming the data type is int,bit,numeric,decimal
BEGIN
SET @stringData=@stringData+'''''''''+isnull(cast('+@colName+' as varchar(200)),''0'')+'''''',''+'
END
SET @string=@string+@colName+','
FETCH NEXT FROM cursCol INTO @colName,@dataType
END
DECLARE @Query nvarchar(4000)
SET @query ='SELECT '''+substring(@string,0,len(@string)) + ') VALUES(''+ ' + substring(@stringData,0,len(@stringData)-2)+'''+'')'' FROM '+@tableName
print @query
--exec sp_executesql @query
CLOSE cursCol
DEALLOCATE cursCol
GO

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