Question

拥有值为

的表格

CREATE TABLE #tbl 
    (
       id int  identity(1,1),
       object_type int ,
       object_id nvarchar(50),
       refl nvarchar(4000)
    )

refl 值的参数如下：

<prov><CProv><object_type>1</object_type><object_id>152</object_id></CProv></prov>
<prov><CProv><object_type>0</object_type><object_id>150</object_id></CProv></prov>
<prov><CProv><object_type>0</object_type><object_id>156</object_id></CProv></prov>
<prov><CProv><object_type>1</object_type><object_id>172</object_id></CProv></prov>

我想选择refl中的所有数据到另一个值declare @val nvarchar(4000)。可能吗？当我尝试select @val = refl from #tbl时，它只选择最后一行，我想选择所有行。怎么样？它必须像

@val = N'<prov><CProv><object_type>1</object_type><object_id>152</object_id></CProv></prov>
    <prov><CProv><object_type>0</object_type><object_id>150</object_id></CProv></prov>
    <prov><CProv><object_type>0</object_type><object_id>156</object_id></CProv></prov>
    <prov><CProv><object_type>1</object_type><object_id>172</object_id></CProv></prov>'

Answer 1

试试这个

DECLARE @val NVARCHAR(4000) 
SELECT @val = COALESCE(@val + '', '') + refl
FROM #tbl

SELECT @val

Answer 2

使用T-SQL split function，然后说

WHERE refl in IN yourSplitFunction(@val)

如何将行插入值

2 个答案: