小编use*_*075的帖子

如何在选择查询中添加if-then-else条件？

我想在a中应用以下条件select query.

IF  (TYPE = MBUSA or SDSA or MDSA OR PC) and (FINAL_STATUS = ACTIVE OR EXECUTED) 
then GET ID and Parent_ID
ELSEIF (TYPE = MSA) and (FINAL_STATUS = ACTIVE OR EXECUTED)
then  GET ID---(USING the ID from the else if condition AS FILTER, 
IF TYPE = (DSA OR BUSA) AND (FINAL_STATUS = ACTIVE OR EXECUTED) 
then GET ID and Parent_ID)

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我需要写一个程序吗？

以下是数据库结构: