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如何将mysql表行转置为列

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如何将mysql表行转置为列

SELECt  DATE_FORMAT(PunchDateTime, '%W') DAY,        MAX(CASE WHEN PunchEvent = 'ClockIn' THEN DATE_FORMAT(PunchDateTime, '%r') END) ClockIn,        MAX(CASE WHEN PunchEvent = 'BreakOut' THEN DATE_FORMAT(PunchDateTime, '%r') END) BreakOut,        MAX(CASE WHEN PunchEvent = 'BreakIn' THEN DATE_FORMAT(PunchDateTime, '%r') END) BreakIn,        MAX(CASE WHEN PunchEvent = 'ClockOut' THEN DATE_FORMAT(PunchDateTime, '%r') END) ClockOutFROM    tableNameWHERe   EmpID = 456GROUP   BY DATE_FORMAT(PunchDateTime, '%W')ORDER   BY PunchDateTime
  • SQLFiddle演示

输出值

╔═══════════╦═════════════╦═════════════╦═════════════╦═════════════╗║    DAY    ║   CLOCKIN   ║  BREAKOUT   ║   BREAKIN   ║  CLOCKOUT   ║╠═══════════╬═════════════╬═════════════╬═════════════╬═════════════╣║ Tuesday   ║ 08:36:26 AM ║ 12:01:29 PM ║ 12:28:31 PM ║ 02:28:33 PM ║║ Wednesday ║ 07:38:34 AM ║ 07:38:39 AM ║ 07:38:41 AM ║ 07:38:42 AM ║╚═══════════╩═════════════╩═════════════╩═════════════╩═════════════╝


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