我需要一个使用CASE语句根据SQLite条件进行减或添加的查询。这是我的时刻查询:在SQLite中使用CASE条件加总或减去
SELECT s.companyName, CASE ia.type
WHEN ia.type='add' THEN SUM(ia.quantity)
WHEN ia.type='subtract' THEN SUM(-ia.type)
ELSE SUM(0) END AS total
FROM stocktake s
LEFT JOIN stocktake_adjustment sa ON s.stocktakeId = sa.stocktakeId
LEFT JOIN adjustment a ON a.adjustmentId = sa.adjustmentId
LEFT JOIN inventory_adjustment ia ON ia.adjustmentId = a.adjustmentId
LEFT JOIN inventory i ON i.inventoryId = ia.inventoryId
LEFT JOIN supplier s ON s.supplierId = i.supplierId
WHERE s.supplierId = '4da99b63-fcb9-9b9f-8415-4896caeb920c';
基本上我想添加如果条件“添加”或减,如果条件是减法,从总。
先谢谢你们。
谢谢安东,正是我需要做的。 –