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比如 select count(*) frmo table_A for update
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This can help youhttp://blog.csdn.net/liqfyiyi...
innodb storage engine supports row locking. Consider other storage engines in detail.
mysql, rr isolation mode, innodb storage engine, will lock each row
My personal feeling is table lock, innodb row lock is conditional 1: There must be where 2: The fields involved in where must have indexes 3: Large range lock. For example, id>=100 will lock all IDs greater than or equal to 100
This can help you
http://blog.csdn.net/liqfyiyi...
innodb storage engine supports row locking.
Consider other storage engines in detail.
mysql, rr isolation mode, innodb storage engine, will lock each row
My personal feeling is table lock, innodb row lock is conditional
1: There must be where
2: The fields involved in where must have indexes
3: Large range lock. For example, id>=100 will lock all IDs greater than or equal to 100