sql - Conditional clause to DROP Table -



sql - Conditional clause to DROP Table -

i trying write sql procedure drop table have pattern in names. below code :

declare @temp table ( id bigint identity(1,1), tabname sysname not null ) insert @temp select table_name information_schema.tables table_name '%:%' declare @processedid bigint = 0 declare @tablename sysname select @processedid = id, @tablename = tabname @temp id > @processedid order id desc while(@processedid not null) begin drop table dbo.[@tablename] select @processedid = id, @tablename = tabname @temp id > @processedid order id desc end

but @tablename not replaced right table name. can 1 point me in right direction.

you need dynamically when want utilize variable name argument, need wrap in string , execute string , little changes while status fit.

i'd this:

declare @temp table ( id bigint identity(1,1), tabname sysname not null ): insert @temp select table_name information_schema.tables table_name '%:%'; declare @tablename varchar(255); declare @count int = isnull((select count(*) @temp t), 0); while(@count > 0) begin select @tablename = tabname @temp t; --if order of drop not important exec('drop table dbo.[' + @tablename+ ']'); delete @temp tabname = @tablename; set @count = isnull((select count(*) @temp t), 0); end

sql

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