如果a1是唯一索引,比较简单,
select id into var_id from a where a1 = '001';如果a1不是唯一索引,
select max(a1) var_id from a where a1 = '001';
select id into var_id from a where a1 = '001';如果a1不是唯一索引,
select max(a1) var_id from a where a1 = '001';
解决方案 »
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