提高mysql 查询效率的三个技巧（Three techniques for improving the efficiency of MySQL queries）.docVIP

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提高mysql 查询效率的三个技巧（Three techniques for improving the efficiency of MySQL queries）.doc

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提高mysql 查询效率的三个技巧（Three techniques for improving the efficiency of MySQL queries）

提高mysql 查询效率的三个技巧（Three techniques for improving the efficiency of MySQL queries） MySQL because of its small size and operation efficiency in database application more and more widely used. When I was in a P2P application development has used MySQL to save the P2P node, due to the application of the P2P, hundreds of thousands of nodes, and the nodes change frequently, so be sure to keep the efficient query and insert the following are three effective. I try to use in the process of doing to improve the efficiency of the 1.. The use of statement bound query to obtain 2. random records of 3. using the connection pool management connection. MySQL because of its small size and operation efficiency in database application more and more widely used. When I was in a P2P application development has used MySQL to save the P2P node, due to the application of the P2P, hundreds of thousands of nodes, and the nodes change frequently, so be sure to keep the efficient query and insert the following are three effective. I try to use in the process of doing to improve the efficiency. L use statement to bind query Statement can be used to construct query syntax tree in advance, no longer need to construct the query syntax tree directly query. So it can improve the query efficiency is very good. This method is suitable for query query fixed but very frequent occasions. Use method: Binding, create a MYSQL_STMT variable, and the query string bound corresponding to the string in the mark representing the incoming variable, each question must specify a variable. Each of the specified query, input variables, incoming MYSQL_STMT variables with available connection handle. The following code: //1. binding Bool CDBManager:: BindInsertStmt (MYSQL * connecthandle) { Make / / insert operation binding MYSQL_BIND insertbind[FEILD_NUM]; If (m_stInsertParam = NULL) M_stInsertParam = new CHostCacheTable; M_stInsertStmt = mysql_stmt_init (connecthandle); Construction / binding string Char insertSQL[SQ