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为什么查询...
SELECT * FROM LicenseHistory a
返回一个包含 1000 行的列表,其中许可证 ID 24965 仅出现在一行上,而查询 ....
SELECT * FROM LicenseHistory a WHERE (LicenseID= 24965)
返回 123 行的列表,所有行都包含许可证 24965(如预期的那样)?