当前位置: 首页 > 图文教程 > 数据库 > MSSQL > sql 多条件组合查询,并根据指定类别找出所有最小子类别的SQL语句备忘

MSSQL
如何用SQL语句来判断已知表是否存在
剖析SQL Server 2005中的报告服务架构
使用Microsoft SQL Server 2000的XML查询
让SQL Server为工作负载高峰提前准备
用Sql server一次插入多条数据
SQL SERVER2000深入学习之常见错误
关于SQL Server数据库的若干注意事项
sql server 2005中的表分区
SQL Server实用经验与技巧大汇集
限制SQL Server只能让指定的机器连接
SQL Server数据汇总完全解析
SQL查询语句使用精华
优化SQL Server服务器内存配置的策略
Sql server进行优化50招特效
用SQL语句实现异构数据库之间的导数据导入/出
SQL Server Compact Edition RC1 发布!
SQL Server死锁的分析
加快SQL Server备份和重新存储的速度
使用TSQL操作面试SQL Server开发人员
SQL 外链接操作小结 inner join left join right join

MSSQL 中的 sql 多条件组合查询,并根据指定类别找出所有最小子类别的SQL语句备忘


出处:互联网   整理: 软晨网(RuanChen.com)   发布: 2009-09-13   浏览: 115 ::
收藏到网摘: n/a

多条件组合查询,并根据指定类别找出所有最小子类别的SQL语句备忘
复制代码 代码如下:

DECLARE @PAGESIZE INT
DECLARE @PAGEINDEX INT
DECLARE @PAGECOUNT INT
DECLARE @RECORDCOUNT INT
SELECT @PAGESIZE=5
SELECT @PAGEINDEX=1
DECLARE @FIELDNAME VARCHAR(50)
DECLARE @FIELDVALUE VARCHAR(50)
DECLARE @OPERATION VARCHAR(50)
--组合条件
DECLARE @WHERE NVARCHAR(1000)
SELECT @WHERE=' WHERE NOTDISPLAY=0 '
DECLARE ABC CURSOR FOR
SELECT FIELDNAME,FIELDVALUE,OPERATION FROM TBPARAMETERS
OPEN ABC
FETCH NEXT FROM ABC INTO @FIELDNAME,@FIELDVALUE,@OPERATION
WHILE @@FETCH_STATUS=0
BEGIN
IF(@OPERATION = 'Like')
SELECT @WHERE=@WHERE + ' AND ' + @FIELDNAME + ' Like ''%'+@FIELDVALUE+'%'''
ELSE
BEGIN
IF(@FIELDNAME='CLASSID')
BEGIN
DECLARE @ROOTID INT
SELECT @ROOTID=@FIELDVALUE
--将指定类别的值的子类加入临时表
INSERT INTO TBTEMCLASS(ID) SELECT ID FROM TBSDINFOCLASS WHERE ROOTID=@ROOTID
--使用游标来将指定类别的最小类别提出放入临时表
DECLARE CLASSID CURSOR FOR
SELECT ID FROM TBTEMCLASS
OPEN CLASSID
FETCH NEXT FROM CLASSID INTO @ROOTID
WHILE @@FETCH_STATUS=0
BEGIN
--如果判断有子类则将子类加入临时表,并删除该类别,以使游标在临时表中循环
IF(EXISTS(SELECT ID FROM TBSDINFOCLASS WHERE ROOTID=@ROOTID))
BEGIN
INSERT INTO TBTEMCLASS(ID) SELECT ID FROM TBSDINFOCLASS WHERE ROOTID=@ROOTID
DELETE FROM TBTEMCLASS WHERE ID=@ROOTID
END
FETCH NEXT FROM CLASSID INTO @ROOTID
END
CLOSE CLASSID
DEALLOCATE CLASSID
--将自身加入临时表
INSERT INTO TBTEMCLASS(ID) SELECT @FIELDVALUE
SELECT @WHERE=@WHERE +' AND CLASSID IN(SELECT ID FROM TBTEMCLASS)'
END
ELSE
SELECT @WHERE=@WHERE + ' AND ' + @FIELDNAME + @OPERATION+@FIELDVALUE
END
FETCH NEXT FROM ABC INTO @FIELDNAME,@FIELDVALUE,@OPERATION
END
CLOSE ABC
DEALLOCATE ABC
TRUNCATE TABLE TBPARAMETERS
-- --计数语句
DECLARE @COUNTSQL NVARCHAR(500)
SELECT @COUNTSQL=N'SELECT @RECORDCOUNT=COUNT(*) FROM TBSDINFO INNER JOIN TBUSER ON TBSDINFO.USERNAME=TBUSER.USERNAME '
SELECT @COUNTSQL=@COUNTSQL+@WHERE
--
-- --执行统计
EXEC sp_executesql @COUNTSQL,
N'@RECORDCOUNT INT OUT',
@RECORDCOUNT OUT
--
-- --计算页数
SET @PageCount = CEILING(@RecordCount * 1.0 / @PageSize)
--
-- --查询语句
DECLARE @SQL NVARCHAR(2000)
DECLARE @ORDERBY VARCHAR(100)
SELECT @ORDERBY=' ORDER BY TBSDINFO.IsCommon DESC,TBSDINFO.CommonTime DESC,TBSDINFO.CreateTime DESC'
IF(@PAGEINDEX=1)
BEGIN
SELECT @SQL='INSERT INTO TBTEMINFO(ID,TITLE,REMARK,CREATETIME,ENDTIME,WEBDOMAIN,CLASSID,CLASSNAME,TYPEID,TYPENAME,PROVINCEID,PROVINCE,CITYID,CITY,COMPANYNAME,ADDRESS,USERTYPE) '
SELECT @SQL=@SQL+'SELECT TOP '+CONVERT(VARCHAR(4),@PAGESIZE)+' TBSDINFO.ID,TITLE,Remark,TBSDINFO.Createtime,EndTime, WebDomain,TBSDINFO.CLASSID,(SELECT CLASSNAME FROM TBSDINFOCLASS WHERE TBSDINFOCLASS.ID=TBSDINFO.CLASSID) AS CLASSNAME,TYPEID,(SELECT TYPENAME FROM TBSDINFOTYPE WHERE TBSDINFO.TYPEID=TBSDINFOTYPE.ID) AS TYPENAME,ProvinceID,(SELECT PROVINCE FROM TBPROVINCE WHERE TBPROVINCE.ID=PROVINCEID) AS PROVINCE,CityID,(SELECT CITY FROM TBCITY WHERE TBCITY.ID=CITYID) AS CITY,CompanyName,TBSDINFO.Address,UserType FROM TBSDINFO INNER JOIN TBUSER ON TBUSER.USERNAME=TBSDINFO.USERNAME'
SELECT @SQL=@SQL+@WHERE
SELECT @SQL=@SQL+@ORDERBY
END
ELSE
BEGIN
DECLARE @MINRECORD INT
SELECT @MINRECORD=(@PAGEINDEX-1)*@PAGESIZE
SELECT @SQL='INSERT INTO TBTEMINFO(ID,TITLE,REMARK,CREATETIME,ENDTIME,WEBDOMAIN,CLASSID,CLASSNAME,TYPEID,TYPENAME,PROVINCEID,PROVINCE,CITYID,CITY,COMPANYNAME,ADDRESS,USERTYPE) '
SELECT @SQL=@SQL+'SELECT TOP '+CONVERT(VARCHAR(4),@PAGESIZE)+' TBSDINFO.ID, TITLE,Remark,TBSDINFO.Createtime,EndTime, WebDomain,TBSDINFO.CLASSID,(SELECT CLASSNAME FROM TBSDINFOCLASS WHERE TBSDINFOCLASS.ID=TBSDINFO.CLASSID) AS CLASSNAME,TYPEID,(SELECT TYPENAME FROM TBSDINFOTYPE WHERE TBSDINFO.TYPEID=TBSDINFOTYPE.ID) AS TYPENAME,ProvinceID,(SELECT PROVINCE FROM TBPROVINCE WHERE TBPROVINCE.ID=PROVINCEID) AS PROVINCE,CityID,(SELECT CITY FROM TBCITY WHERE TBCITY.ID=CITYID) AS CITY,CompanyName,TBSDINFO.Address,UserType FROM TBSDINFO INNER JOIN TBUSER ON TBUSER.USERNAME=TBSDINFO.USERNAME'
IF(@WHERE<>'')
SELECT @SQL=@SQL+@WHERE+' AND '
ELSE
SELECT @SQL=@SQL+' WHERE '
SELECT @SQL=@SQL+' TBSDINFO.ID NOT IN(SELECT TOP '+CONVERT(VARCHAR(4),@MINRECORD)+' TBSDINFO.ID FROM TBSDINFO INNER JOIN TBUSER ON TBUSER.USERNAME=TBSDINFO.USERNAME '+@WHERE+@ORDERBY+')'
SELECT @SQL=@SQL+@ORDERBY
END
--PRINT @SQL
--执行查询
--查询的结果是将找到的记录放入临时表,再通过以下游标查询出相应的父类与根类记录
EXEC (@SQL)
DECLARE @CLASSID INT
DECLARE @ID INT
DECLARE TEM CURSOR FOR
SELECT ID,CLASSID FROM TBTEMINFO
OPEN TEM
FETCH NEXT FROM TEM INTO @ID,@CLASSID
WHILE @@FETCH_STATUS=0
BEGIN
DECLARE @NS VARCHAR(500)
DECLARE @DS VARCHAR(200)
SELECT @NS=''
SELECT @DS=''
DECLARE @TEMROOTID INT
DECLARE @TEMTS VARCHAR(50)
SELECT @CLASSID=ID,@TEMTS=CLASSNAME,@TEMROOTID=ROOTID FROM TBSDINFOCLASS WHERE ID=@CLASSID
SELECT @NS=@TEMTS+'#'+@NS
SELECT @DS=CONVERT(VARCHAR(10),@CLASSID)+'#'+@DS
WHILE(@TEMROOTID>0)
BEGIN
SELECT @TEMROOTID=ROOTID,@CLASSID=ID,@TEMTS=CLASSNAME FROM TBSDINFOCLASS WHERE ID=@TEMROOTID
SELECT @NS=@TEMTS+'#'+@NS
SELECT @DS=CONVERT(VARCHAR(10),@CLASSID)+'#'+@DS
END
UPDATE TBTEMINFO SET NS=@NS,DS=@DS WHERE ID=@ID
FETCH NEXT FROM TEM INTO @ID,@CLASSID
END
CLOSE TEM
DEALLOCATE TEM

SELECT * FROM TBTEMINFO
TRUNCATE TABLE TBTEMINFO
TRUNCATE TABLE TBTEMCLASS