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See a very comprehensive SQL optimization article, in the development of the work often do not consider the performance of the lack of (at the beginning of the data volume is not seen the difference in speed). But the more you write, the more you

See a very comprehensive SQL optimization article, in the development of the work often do not consider the performance of the lack of (at the beginning of the data volume is not seen the difference in speed). But the more you write, the more you

optimization Problems of databasefirst, the question of the proposedIn the early stage of application system development, due to less development database data, the query SQL statement, complex view of the writing of the performance of the SQL

In the early stage of application system development, due to less development database data, the query SQL statement, complex view of the writing of the performance of the SQL statement is not good or bad, but if the application system submitted to

1.ORACLE Optimizer total 3 kinds A, rule (rule-based) B, cost (based on costs) C, CHOOSE (optional) Set the default optimizer to pass various declarations of optimizer_mode parameters in the Init.ora file, such as

Today, in the foreign periodicals it review, I saw a summary of the use of. htaccess, I think it is very good, because WP blog there are other PHP Web Service site Many are used. htaccess to manage issues such as efficiency and security, it is

Today, in the foreign periodicals it review, I saw a summary of the use of. htaccess, I think it is very good, because WP blog there are other PHP Web Service site Many are used. htaccess to manage issues such as efficiency and security, it is