2
我想合併catetegory_id
和subCategory_id
爲一列。但我不知道如何在靈活的查詢中做到這一點。下面的代碼是我想要做的如何在彈性查詢中執行UNION
SELECT * FROM
(SELECT
ccr.targetpk as pk
FROM
Categories cc
JOIN Cat2CatRel ccr ON cc.pk = ccr.sourcepk
WHERE cc.p_code = '0106')
UNION SELECT CATE.pk as pk FROM CATEGORIES cate WHERE CATE.p_code = '0106'
我需要一個靈活的查詢,其作用與上述代碼相同。