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Computed Column on Split Value?
原标题:Computed Column on Split Value?

Using SQL Server 2022, attempt to create a computed column for indexing/queries on the 3rd part of a string separated by slashes (it s a URI).

Alter Table MyTable Add SpotName As 
(  Cast(    (Select Value from String_Split(FullUri, / ,7) )
as VarChar(128) )             ) Persisted

错误是

在这方面不允许设立分局。 只允许 expressions语。

我想对5个国际独立人士协会的不同部分这样做,因此,对不同分部分的询问进行指数化/优化是明智的。

感谢。

问题回答

你可以做些什么。

Alter Table MyTable 
Add SpotName As (  Cast(JSON_VALUE( ["  + REPLACE(FullUri,  / ,  "," ) +  "] ,  $[6] )as VarChar(128))) PERSISTED

以被视为决定性的方式分立,可以坚持和(或)指数化,而不使用Scalar UDFs(,在表上用默认的平行。

Note the position is 0 based - not 1 based. Fiddle





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