where 子句中的动态值

Question

我正在尝试从 table 中逐行读取并将值传递给查询条件。我无法继续进行。我必须使用计数器/迭代还是有任何选项。非常感谢任何帮助

我想把值传进条件值之类的

create table #temp 
(
     userid int,
     typeid int
)

insert into #temp values (1, 101)
insert into #temp values (1, 221)
insert into #temp values (3, 401)
insert into #temp values (4, 501)
    
create table #target
(
     userid int,
     roleid int,
     value varchar(max)
)
    
insert into #target values (1, 000, 'something here userid:1 typeid:101 something here')
insert into #target values (1, 001, 'something here userid:1 typeid:221 something here')
insert into #target values (1, 001, 'something here userid:1 typeid:331 something here')
insert into #target values (3, 002, 'something here userid:3 typeid:401 something here')
    
    
select t.userid, d.roleid, t.typeid
from #target d
inner join #temp t on t.userid = d.userid
                   and value like '%userid:'t.userid' typeid:'t.typeid'%'

这是我得到的结果：

userid	roleid	typeid
1	000	101
1	001	221
3	002	401

Answer 1

看来您只需要熟悉一下 string concatenation operator:

select t.userid, roleid, typeid
  -- How to debug such a query
  --, [value]
  --,'%userid:' + convert(varchar(32),t.userid) + ' typeid:' + convert(varchar(32),t.typeid) + '%'
  --, case when d.[value] like '%userid:' + convert(varchar(32),t.userid) + ' typeid:' + convert(varchar(32),t.typeid) + '%' then 1 else 0 end
from #target d
inner join #temp t on t.userid = d.userid
  and d.[value] like '%userid:' + convert(varchar(32),t.userid) + ' typeid:' + convert(varchar(32),t.typeid) + '%'

Returns

userid	roleid	typeid
1	0	101
1	1	221
3	2	401

where 子句中的动态值

Dynamic values in where clause

sql

tsql

sql-server

dynamic

where-clause