Database-Development - Related information

  • Mysql and java multi-table join service optimization?

    thinking about doing homework. If there is such a check-in system Design according to the paradigm College schedule course schedule (College schedule one to many) teacher schedule Student schedule Teaching schedule (teacher schedule many to many...

  • MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
    MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1b2ba75-2b2fd.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
    MySQL Errno : 1021
    Message : Disk full (/tmp/#sql-temptable-64f5-1b2ba75-2b2fd.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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