sqlserver比对,sql 对比

sqlserver如何比较两个日期（datetime）的年月大小，比较到年月，不比较日

select * from xxxx where datediff(m,dt1,dt2)

datediff:日期比较函数,SQL server自带的,会将比较的两个日期比较部分的差值返回,m表示比较月

相关问答

Q1: SQLServer两个值比较的问题

SET @COUNTA= len(replace(@ROW,',',',,'))-len(@ROW)

SET @COUNTB=LEN(REPLACE(@VALUES,',',',,'))-LEN(@VALUES)

IF(@COUNTA@COUNTB)

Q2: SqlServer怎么比较两个表的字段是否一致

--2个表比较

DECLARE @SourceTableName VARCHAR(100)

DECLARE @DestTableName VARCHAR(100)

SET @SourceTableName = 'TableA'

SET @DestTableName = 'TableB'

SELECT A.TABLE_NAME AS SourceTable

,A.COLUMN_NAME AS SourceColumn

,A.DATA_TYPE AS SourceType

,B.TABLE_NAME AS DestTable

,B.COLUMN_NAME AS DestColumn

,B.DATA_TYPE AS DestType

FROM (SELECT * FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME = @SourceTableName) A

FULL OUTER JOIN (SELECT * FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME = @DestTableName) B

ON A.COLUMN_NAME = B.COLUMN_NAME AND A.DATA_TYPE = B.DATA_TYPE

WHERE A.TABLE_NAME IS NULL OR B.TABLE_NAME IS NULL