- SQL Server
declare
@v_code varchar(4);
select @v_code=CountryRegionCode from Person.CountryRegion where @@ROWCOUNT=1;
select * from Person.CountryRegion where CountryRegionCode=@v_code
declare
@v_code varchar(4);
select @v_code=CountryRegionCode from Person.CountryRegion where @@ROWCOUNT=1;
select * from Person.CountryRegion where CountryRegionCode=@v_code
本文标题：SQL变量的定义及使用
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