Tag:Military regulations

  • MySQL learning notes-3-index

    Time:2021-11-24

    1. Some basic concepts of index An index is a data structureIndex is to improve the efficiency of data query Example: dictionary. The initial consonant query method is cluster index. The radical is the secondary index, and the radical + stroke is the joint index. 2. Common index model Model Table b scene scene Hashtable […]

  • Explain 30 military rules of MySQL in detail

    Time:2021-1-31

    1、 Basic specification (1) The InnoDB storage engine must be usedInterpretation: support transaction, row level lock, better concurrency performance, CPU and memory cache page optimization make resource utilization higher (2) The utf8 character set must be usedInterpretation: Wanguo code, no transcoding, no random code risk, save space (3) Chinese notes must be added to data […]