从当前日期sql减去几个月

Question

我正在尝试从今天减去日期（获取1个月前直到永远报告）。到目前为止，已经尝试了

DATE_SUB(NOW(), INTERVAL 1 MONTH) 

以下是上下文：

SELECT contracts.currency , ROUND(SUM( 
    CASE
        WHEN contracts.currency = 'USD' THEN contracts.value*550
        WHEN contracts.currency = 'UF' THEN contracts.value*22000
        ELSE contracts.value
    END),2)
    AS real_value
FROM contracts
WHERE currency IN ('USD','UF','CLP') AND date >=DATE_SUB(NOW(), INTERVAL 1 MONTH)
GROUP BY currency 
ORDER BY currency ASC

Answer 1

看看这是否有帮助：

SELECT contracts.currency , ROUND(SUM( 
CASE contracts.currency
    WHEN 'USD' THEN contracts.value*550
    WHEN 'UF'  THEN contracts.value*22000
    ELSE contracts.value
END),2)
AS real_value
FROM contracts
WHERE currency IN ('USD','UF','CLP') AND 
      date >=DATE_SUB(curdate(), INTERVAL 1 MONTH) AND
      date <=curdate()
GROUP BY currency 
ORDER BY currency ASC

如果没有，最好检查表中“日期”列的类型。有时它是varchar而不是date。如果您不是创建该表的人。