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Analyze and compare execution time plan reads1. View execution time and CPUSET STATISTICS Time Onselect * from Bus_devhistorydataset statistics time offYou can see it in the message after execution.2. View the operation of the query for I/OSET

1. View execution time and CPUSET STATISTICS Time Onselect * from Bus_devhistorydataset statistics time offYou can see it in the message after execution.2. View the operation of the query for I/OSET STATISTICS IO onselect * from

First, the Database design optimization1. Do not use cursors.Using cursors not only takes up memory, but also locks tables in incredible ways, so that all the performance optimizations that DBAs can do are equal to not being done. Each fetch in the

Analyze and compare execution time plan reads1. View execution time and CPUSET STATISTICS Time Onselect * from Bus_devhistorydataset statistics time offYou can see it in the message after execution.2. View the operation of the query for I/OSET

MS SQL Server Query optimization methodThere are many reasons for the slow speed of queries, which are common1, no indexes, or no indexes (this is the most common problem with query slowness, is the flaw in programming)2, I/o throughput is small,

Original address: http://www.cnblogs.com/sydeveloper/archive/2013/04/03/2992881.html First, the Database design optimization 1. Do not use cursors. Using cursors not only takes up memory, but also locks tables in incredible ways, so that all the

1. To optimize the query, to avoid full table scanning, first consider the where and order by the columns involved in the index.2. Avoid null-valued fields in the WHERE clause, which will cause the engine to discard full-table scans using the index,

1. Efficient SQL statement design:Typically, you can use the following methods to optimize the performance of SQL for data operations:(1) Reduce the number of queries to the database, that is, reduce requests for system resources, using distributed

1. Time Zone settings Sometimes, when you use the date or mktime function in PHP, it will display some strange information due to different time zones. The following is one of the solutions to this problem. Is to set the time zone of your server.

1. Time zone Settings Sometimes, when you use the date or Mktime function in PHP, it will show some very strange information because of the different time zones. Here is one way to solve this problem. is to set your server's time zone. You can find