基本信息

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   源码介绍

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一、SQL SERVER 月、季、年统计查询

 

--本天

 

SELECT *FROM dbo.TableName WHERE DATEDIFF(DAY,TimeField,getdate())= 0;

 

--本周

 

SELECT *FROM dbo.TableName WHERE DATEDIFF(WEEK,TimeField,getdate())= 0;

 

--本月

 

SELECT *FROM dbo.TableName WHERE DATEDIFF(MONTH,TimeField,getdate())= 0;

 

--本季度

 

SELECT *FROM dbo.TableName WHERE DATEPART(qq, TimeField) = DATEPART(qq, GETDATE()) and DATEPART(yy, TimeField) = DATEPART(yy, GETDATE());

 

--本年

 

SELECT *FROM dbo.TableName where DATEDIFF(YEAR, TimeField,getdate())= 0;

 

注：TableName为查询的表名，TimeFiled为查询的时间字段

 

二、SQL SERVER 判断表、字段、存储过程、触发器是否存在

 

--判断表是否存在

 

SELECT *FROM sys.objects WHERE OBJECT_ID = OBJECT_ID('表名') AND OBJECTPROPERTY(object_id, N'IsUserTable') = 1

 

--或

 

SELECT *FROM sys.objects WHERE OBJECT_ID = OBJECT_ID('表名') AND type='u'

 

--判断字段是否存在

 

SELECT *FROM sys.columns WHERE OBJECT_ID = OBJECT_ID('字段名') AND Name = 'No'

 

--判断存储过程是否存在

 

SELECT *FROM sys.objects WHERE OBJECT_ID = OBJECT_ID('存储过程名') AND

 

OBJECTPROPERTY(object_id, N'IsProcedure') = 1

 

--或

 

SELECT *FROM sys.objects WHERE OBJECT_ID = OBJECT_ID('存储过程名') AND type='p'

 

--判断触发器是否存在

 

SELECT *FROM sys.objects WHERE OBJECT_ID = OBJECT_ID('触发器名') AND OBJECTPROPERTY(object_id, N'IsTrigger') = 1

 

--或

 

SELECT *FROM sys.objects WHERE OBJECT_ID = OBJECT_ID('触发器名') AND type='TR'

 

三 、表复制语句

 

-- 要求表2不存在，查询时自动创建

 

Select Field1,Field2 from Table1 Into Table2

 

--要求表2必须存在，可以插入常量

 

Insert into table2 (Field1,Field2) select Field1,Field2 from table1

 

四、关联更新

 

UPDATE Table1 SET T1F1 = T2F1, T1F2 = T2F2, T1F3 = T2F3 FROM Table1, Table2 WHERE Table1.Key = Table2.Key

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SQL SERVER 月、季、年统计与常用查询语句汇总