sybase数据库中索引导致sql语句执行不成功
SELECT DISTINCT A.CASEPROP AS PROP,'旧存' AS AJLX,0 AS AJLXXH,A.CASE_PROP AS PROPNO
,M1=( SELECT COUNT(*) from CASES WHERE CASEPROP=A.CASEPROP AND
(PERMITDAY <'2008.12.26 00:00:00' AND (SHUTDAY IS NULL OR
SHUTDAY<'1900-01-01 00:00:00' OR SHUTDAY>='2008.12.26 00:00:00') )) ,
M2=( SELECT COUNT(*) from CASES WHERE CASEPROP=A.CASEPROP
AND (PERMITDAY <'2009.01.26 00:00:00' AND
(SHUTDAY IS NULL OR SHUTDAY<'1900-01-01 00:00:00' OR SHUTDAY>='2009.01.26 00:00:00') )) ,
M3=( SELECT COUNT(*) from CASES WHERE CASEPROP=A.CASEPROP
AND (PERMITDAY <'2009.02.26 00:00:00' AND (SHUTDAY IS NULL
OR SHUTDAY<'1900-01-01 00:00:00' OR SHUTDAY>='2009.02.26 00:00:00') )) ,
M4=( SELECT COUNT(*) from CASES WHERE CASEPROP=A.CASEPROP AND
(PERMITDAY <'2009.03.26 00:00:00' AND
(SHUTDAY IS NULL OR SHUTDAY<'1900-01-01 00:00:00' OR SHUTDAY>='2009.03.26 00:00:00') )) ,
M5=( SELECT COUNT(*) from CASES WHERE CASEPROP=A.CASEPROP AND
(PERMITDAY <'2009.04.26 00:00:00' AND
(SHUTDAY IS NULL OR SHUTDAY<'1900-01-01 00:00:00' OR SHUTDAY>='2009.04.26 00:00:00') )) ,
M6=( SELECT COUNT(*) from CASES WHERE CASEPROP=A.CASEPROP AND
(PERMITDAY <'2009.05.26 00:00:00' AND
(SHUTDAY IS NULL OR SHUTDAY<'1900-01-01 00:00:00' OR SHUTDAY>='2009.05.26 00:00:00') )) ,
M7=( SELECT COUNT(*) from CASES WHERE CASEPROP=A.CASEPROP AND
(PERMITDAY <'2009.06.26 00:00:00' AND (SHUTDAY IS NULL OR SHUTDAY<'1900-01-01 00:00:00' OR SHUTDAY>='2009.06.26 00:00:00') )) ,M8=( SELECT COUNT(*) from CASES WHERE CASEPROP=A.CASEPROP AND (PERMITDAY <'2009.07.26 00:00:00' AND (SHUTDAY IS NULL OR SHUTDAY<'1900-01-01 00:00:00' OR SHUTDAY>='2009.07.26 00:00:00') )) ,M9=( SELECT COUNT(*) from CASES WHERE CASEPROP=A.CASEPROP AND (PERMITDAY <'2009.08.26 00:00:00' AND (SHUTDAY IS NULL OR
SHUTDAY<'1900-01-01 00:00:00' OR SHUTDAY>='2009.08.26 00:00:00') )) ,M10=( SELECT COUNT(*) from CASES WHERE CASEPROP=A.CASE
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select datediff(month,'2009-11-02','2009-12-01')
不知道你要怎么个月差异
上面的命令结果也是1
但是其实按照常识差异不是一个月，是差一天一个月
这有段现成的代码可以帮助你算出常识上的差异
SQL code
declare @t table(a datetime,b datetime);
insert @t
select '2009-11-02','2009-12-01' UNION ......
(1)char、varchar、text和nchar、nvarchar、ntext
char和varchar的长度都在1到8000之间，它们的区别在于char是定长字符数据，而varchar是变长字符数据。所谓定长就是长度固定 的，当输入的数据长度没有达到指定的长度时将自动以英文空格在其后面填充，使长度达到相应的长度；而变长字符数据则不会以空格填充。 text� ......
问题一、忘记了登录Microsoft SQL Server 2005 的sa的登录密码
解决方法：先用windows身份验证的方式登录进去，然后在‘安全性’-‘登录’-右键单击‘sa’-‘属性’，修改密码点击确定就可以了。
问题二、已成功与服务器建立连接，但是在登录过程中发生错取。（provider:� ......
SQLServer2005里使用with encryption选项创建的存储过程仍然和sqlserver2000里一样，都是使用XOR进行了的加密。和2000不一样的是，在2005的系统 表syscomments里已经查不到加密过的密文了。要查密文必须使用DAC(专用管理员连接)连接到数据库后，在系统表 sys.sysobjvalues查询，该表的列imageval存储了相应的密文。具 ......
SQL中on条件与where条件的区别
数据库在通过连接两张或多张表来返回记录时，都会生成一张中间的临时表，然后再将这张临时表返回给用户。
在使用left jion时，on和where条件的区别如下：
1、 on条件是在生成临时表时使用的条� ......
