。如果ITEM
包含%USED-%
(USED-),那么我想使其TIER1
Used Restaurant Equipment
因此它相应地进行分组。MYSQL IF字段包含这使得其他字段这我在我的表1字段中有一个字段
这是我目前的说法,我如何用IF
或CASE
实现上述目标?
select
CT.TIER1, CT.TIER2
from
trx.table1 MT
LEFT JOIN
trx.table2 CT1 ON MT.ITEM = CT1.ITEM
LEFT JOIN
trx.table3 CT ON CT1.WEB_NUM = CT.WEBNUMBER
GROUP BY CT.TIER1
LIMIT 0 , 15
电流输出:
TIER1 TIER2
NULL NULL
Business Type Ice Cream Equipment
Chinese Food Equipment Ricers
Concession Equipment Concession Accessories
Cooking Equipment Fryers
Food Preparation Food Preparation Supplies
Food Storage Storage Racks
Food Warming Equipment Hot Food Wells
我期望仍有一些NULL
层1和层2的,但我希望它也显示等级1为“二手餐饮设备”,与此类似:
TIER1 TIER2
NULL NULL
Used Restaurant Equipment NULL
Business Type Ice Cream Equipment
Chinese Food Equipment Ricers
Concession Equipment Concession
请添加一些示例数据和预期的结果。 –
已更新,希望这解释更多 – ToddN
@ToddN预期的输出是有帮助的,但生成输出的数据也会有帮助......具体而言,您对“ITEM”有什么价值? –