摘要：
ProblemWhen writing T-SQL, a lot of developers use either COALESCE or ISNULLin order to provide a default value in cases where the input is NULL. They have various reasons for their choice, though sometimes this choice may be based on false assumptions. Some think that ISNULL is always faster than C 阅读全文
摘要：
ProblemSQL Server 2008 and earlier versions used the CONVERT functions to handle date formatting. In this tip, Date and Time Conversions Using SQL Server, we have a list of the available examples on how to use the CONVERT function to handle different date formats. As you may notice, this function is 阅读全文