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
SQL Server教程:备份和恢复措施
合理建立索引-提高SQL Server的性能之法
SQL Server查询过程中 实际消耗了多大内存?
教程:SQL Server 2008 数据挖掘的概念
在SQL Server中生成脚本的方法
如何提高SQL Server复制的向后兼容性
为SQL Server 2008添加报表服务的虚拟目录
在SQL Server中创建全局临时表
SQL Server触发器的使用方法
如何通过调整Windows参数提高数据库服务器性能
详解SQL Server 2005 FOR XML嵌套查询的使用
初识Sybase数据库
浅谈SQL Server Compact的DLL文件
丢失的数据忘记备份怎么办?
SQLServer数据库中如何保持数据一致性
教你解决SQLServer与服务器连接时出错
SQLServer中游标是如何处理数据的?
SQL Sever性能怎样全方位诊断?
SQL Server教程:详细学习游标
详解SQLServer 存储过程

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: 170 ::
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