Private Declare Sub CopyMemory Lib "kernel32" Alias "RtlMoveMemory" (hpvDest As Any, hpvSource As Any, ByVal cbCopy As Long)
Private Declare Function InitDecompression Lib "gzip.dll" () As Long
Pri...
2022-12-07:删除重复的电子邮箱。删除重复数据后,id=3的数据被删除。请问sql语句如何写?
DROP TABLE IF EXISTS `person`;
CREATE TABLE `person` (
`id` int(11) NOT NULL,
`email` varchar(255) NOT NULL...