Clausola TOP n

Francesco Giossi — Wed, 23 Apr 2008 21:48:24 GMT

SQL Server: SELECT TOP 10 product, descr, email FROM products ORACLE: SELECT product, descr, email FROM products WHERE ROWNUM <= 10 MySQL: SELECT product, descr, email FROM products LIMIT 10

How to format a value using T-SQL: pad left

Francesco Giossi — Thu, 15 Nov 2007 09:55:10 GMT

SQL server has no built-in format functions. Here is a user defined function which left-pad a varchar value with a variable length string. CREATE FUNCTION [dbo].[PadString] (@Seq varchar(16), @PadWith char(1), @PadLength int ) RETURNS varchar(16) AS BEGIN declare @curSeq varchar(16) SELECT @curSeq = ISNULL(REPLICATE(@PadWith, @PadLength - len(ISNULL(@Seq ,0))), '') + @Seq RETURN @curSeq END Testing the function: SELECT dbo.PadString ('8', '0', 5) SELECT dbo.PadString ('abc', '*', 12) SELECT dbo.PadString ('abc', '0', 7) Here are the results: ---------------- 00008 (1 row(s) affected) ---------------- *********abc (1 row(s) affected) ---------------- 0000abc (1 row(s) affected) --------------------------------------------------------- TAGS: sql server format string pad left