select * from drv_driver t where t.csrq>sysdate-0.1谁见过这样的sql语句,它的意思是啥.where后面的具体啥意思.答的好,
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![select * from drv_driver t where t.csrq>sysdate-0.1谁见过这样的sql语句,它的意思是啥.where后面的具体啥意思.答的好,](/uploads/image/z/12164103-63-3.jpg?t=select+%2A+from+drv_driver+t+where+t.csrq%3Esysdate-0.1%E8%B0%81%E8%A7%81%E8%BF%87%E8%BF%99%E6%A0%B7%E7%9A%84sql%E8%AF%AD%E5%8F%A5%2C%E5%AE%83%E7%9A%84%E6%84%8F%E6%80%9D%E6%98%AF%E5%95%A5.where%E5%90%8E%E9%9D%A2%E7%9A%84%E5%85%B7%E4%BD%93%E5%95%A5%E6%84%8F%E6%80%9D.%E7%AD%94%E7%9A%84%E5%A5%BD%2C)
select * from drv_driver t where t.csrq>sysdate-0.1谁见过这样的sql语句,它的意思是啥.where后面的具体啥意思.答的好,
select * from drv_driver t where t.csrq>sysdate-0.1谁见过这样的sql语句,它的意思是啥.
where后面的具体啥意思.答的好,
select * from drv_driver t where t.csrq>sysdate-0.1谁见过这样的sql语句,它的意思是啥.where后面的具体啥意思.答的好,
sysdate是oracle里表示当前时间的意思
sysdate+/-1是当前时间加/减一天,sysdate+/-(1/48)就是加/减 半个小时,sysdate+/-0.1就是加/减2个多小时吧.
"t"是drv_driver表的别名,使用时性质一样,主要能防止相同字段.where后面的意思就是表drv_driver的csrq字段值要大于当前时间-2个多小时
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