我需要添加来自整数列的分钟,并使用时间戳与另一列进行比较。
这是一个例子:
SELECT t1.id_liame, t1.id_table, t1.periodicidade , t3.data_extracao,
CASE WHEN(NOW() < (e.data_extracao + INTERVAL t1.periodicidade || '
MINUTES'))
THEN 'yes' ELSE 'no' END
FROM table1 as t1 LEFT JOIN liame_has_extracao as t2 USING(id_liame)
LEFT JOIN extracao as t3 USING(id_extracao)
l.periodicidade
是整数(分钟)
我需要验证data_extracao(timestamp)
是否大于NOW() + l.periodicidade(integer - minutes)
。
我该怎么做?
答案 0 :(得分:22)
您可以这样编写查询:
SELECT
t1.id_liame,
t1.id_table,
t1.periodicidade,
t3.data_extracao,
CASE
WHEN(NOW() < (t3.data_extracao + (INTERVAL '1 min' * t1.periodicidade)))
THEN 'yes' ELSE 'no'
END
FROM table1 AS t1
LEFT JOIN liame_has_extracao AS t2 USING(id_liame)
LEFT JOIN extracao AS t3 USING(id_extracao)
如您所见,您可以将间隔乘以整数,以便INTERVAL '1 minute'
定义基本单位并乘以实际时间间隔。
希望有所帮助