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select * from mydbtb where name like '%施海仙%' or name like '%余斌%'
Select * from ResearchReport
where charindex(',施海仙,',','+Author+',')>0
or charindex(',余斌,',','+Author+',')>0
/*
标题:分解字符串并查询相关数据
作者:爱新觉罗.毓华(十八年风雨,守得冰山雪莲花开)
时间:2008-03-18
地点:广东深圳
说明:通过使用函数等方法分解字符串查询相关数据。
问题:通过分解一个带某种符号分隔的字符串在数据库中查找相关数据。
例如 @str = '1,2,3',查询下表得到记录1,4,5,6
ID TypeID
1 1,2,3,4,5,6,7,8,9,10,11,12
2 2,3
3 3,7,8,9
4 2,6
5 4,5
6 6,7
*/
-----------------------------
create table tb (ID int , TypeID varchar(30))
insert into tb values(1 , '1,2,3,4,5,6,7,8,9,10,11,12')
insert into tb values(2 , '2,3')
insert into tb values(3 , '3,7,8,9')
insert into tb values(4 , '2,6')
insert into tb values(5 , '4,5')
insert into tb values(6 , '6,7')
go
-----------------------------
--如果仅仅是一个,如@str = '1'.
declare @str as varchar(30)
set @str = '1'
select * from tb where charindex(',' + @str + ',' , ',' + TypeID + ',') > 0
select * from tb where ',' + TypeID + ',' like '%,' + @str + ',%'
/*
ID TypeID
----------- ------------------------------
1 1,2,3,4,5,6,7,8,9,10,11,12
(所影响的行数为 1 行)
*/
-----------------------------
--如果包含两个,如@str = '1,2'.
declare @str as varchar(30)
set @str = '1,2'
select * from tb where charindex(',' + left(@str , charindex(',' , @str) - 1) + ',' , ',' + typeid + ',') > 0 or
charindex(',' + substring(@str , charindex(',' , @str) + 1 , len(@str)) + ',' , ',' + typeid + ',') > 0
select * from tb where ',' + typeid + ',' like '%,' + left(@str , charindex(',' , @str) - 1) + ',%' or
',' + typeid + ',' like '%,' + substring(@str , charindex(',' , @str) + 1 , len(@str)) + ',%'
/*
ID TypeID
----------- ------------------------------
1 1,2,3,4,5,6,7,8,9,10,11,12
2 2,3
4 2,6
(所影响的行数为 3 行)
*/
-------------------------------------------
--如果包含三个或四个,用PARSENAME函数来处理.
declare @str as varchar(30)
set @str = '1,2,3,4'
select * from tb where
charindex(',' + parsename(replace(@str , ',' , '.') , 4) + ',' , ',' + typeid + ',') > 0 or
charindex(',' + parsename(replace(@str , ',' , '.') , 3) + ',' , ',' + typeid + ',') > 0 or
charindex(',' + parsename(replace(@str , ',' , '.') , 2) + ',' , ',' + typeid + ',') > 0 or
charindex(',' + parsename(replace(@str , ',' , '.') , 1) + ',' , ',' + typeid + ',') > 0
select * from tb where
',' + typeid + ',' like '%,' + parsename(replace(@str , ',' , '.') , 4) + ',%' or
',' + typeid + ',' like '%,' + parsename(replace(@str , ',' , '.') , 3) + ',%' or
',' + typeid + ',' like '%,' + parsename(replace(@str , ',' , '.') , 2) + ',%' or
',' + typeid + ',' like '%,' + parsename(replace(@str , ',' , '.') , 1) + ',%'
/*
ID TypeID
----------- ------------------------------
1 1,2,3,4,5,6,7,8,9,10,11,12
2 2,3
3 3,7,8,9
4 2,6
5 4,5
(所影响的行数为 5 行)
*/
---------------------------------------
--如果超过四个,则只能使用函数或动态SQL来分解并查询数据。
/*
名称:fn_split函数.
功能:实现字符串分隔功能的函数
*/
create function dbo.fn_split(@inputstr varchar(8000), @seprator varchar(10))
returns @temp table (a varchar(200))
as
begin
declare @i int
set @inputstr = rtrim(ltrim(@inputstr))
set @i = charindex(@seprator , @inputstr)
while @i >= 1
begin
insert @temp values(left(@inputstr , @i - 1))
set @inputstr = substring(@inputstr , @i + 1 , len(@inputstr) - @i)
set @i = charindex(@seprator , @inputstr)
end
if @inputstr <> '\'
insert @temp values(@inputstr)
return
end
go
--调用
declare @str as varchar(30)
set @str = '1,2,3,4,5'
select distinct m.* from tb m,
(select * from dbo.fn_split(@str,',')) n
where charindex(',' + n.a + ',' , ',' + m.typeid + ',') > 0
drop table tb
drop function dbo.fn_split
/*
ID TypeID
----------- ------------------------------
1 1,2,3,4,5,6,7,8,9,10,11,12
2 2,3
3 3,7,8,9
4 2,6
5 4,5
(所影响的行数为 5 行)
*/
------------------------------------------
--使用动态SQL的语句。
declare @str varchar(200)
declare @sql as varchar(1000)
set @str = '1,2,3,4,5'
set @sql = 'select ''' + replace(@str , ',' , ''' as id union all select ''')
set @sql = @sql + ''''
set @sql = 'select distinct a.* from tb a , (' + @sql + ') b where charindex(' + ''','' + b.id + ' + ''',''' + ' , ' + ''','' + a.typeid + ' + ''',''' + ') > 0 '
exec (@sql)
/*
ID TypeID
----------- ------------------------------
1 1,2,3,4,5,6,7,8,9,10,11,12
2 2,3
3 3,7,8,9
4 2,6
5 4,5
(所影响的行数为 5 行)
*/
create table tb(id int,author varchar(40))
insert into tb values(1,'施海仙')
insert into tb values(2,'施海仙,余斌')
insert into tb values(3,'余斌')
go
select * from tb where Author like '%施海仙%' or Author like '%余斌%'
drop table tb
/*
id author
----------- ----------------------------------------
1 施海仙
2 施海仙,余斌
3 余斌
(所影响的行数为 3 行)
*/
select * from ResearchReport where Author like '%施海仙%' or Author like '%余斌%'
create table t(id int,author varchar(40))
insert into t values(1,'施海仙')
insert into t values(2,'施海仙,余斌')
insert into t values(2,'施海仙1,余斌1')
insert into t values(2,'施海仙2,余斌2')
insert into t values(3,'余斌')
go
create function f_str(@str1 varchar(40),@str2 varchar(40))
returns int
as
begin
declare @str3 varchar(40)
select @str1=@str1+',', @str2=','+@str2+','
while charindex(',',@str1)>0
begin
select @str3=left(@str1,charindex(',',@str1)),
@str1=stuff(@str1,1,charindex(',',@str1),'')
if charindex(','+@str3,@str2)>0
return 1
end
return 0
end
go
select * from t where dbo.f_str(author,'施海仙,余斌')=1
/*
id author
----------- ----------------------------------------
1 施海仙
2 施海仙,余斌
3 余斌
*/
go
drop function f_str
drop table t
go
CREATE TABLE TB(id INT, author NVARCHAR(10))
INSERT TB
SELECT 1, N'施海仙' UNION ALL
SELECT 2, N'施海仙,余斌' UNION ALL
SELECT 3, N'余斌'
SELECT TOP 100 ID=IDENTITY(INT,1,1) INTO # FROM SYSCOLUMNS
SELECT A.* FROM
(
SELECT DISTINCT ID
FROM (
SELECT A.ID,SUBSTRING(author, T.ID, CHARINDEX(',', AUTHOR+',', T.ID)-T.ID) AS AUTHOR
FROM TB AS A,# AS T
WHERE CHARINDEX(',', ','+author,T.ID)=T.ID
) T
WHERE AUTHOR IN ('施海仙','余斌')
) B JOIN TB AS A ON A.ID=B.ID
DROP TABLE TB
DROP TABLE #
/*
id author
----------- ----------
1 施海仙
2 施海仙,余斌
3 余斌
*/