MySQL for OEM/ISV Over 2000 ISVs, OEMs, and VARs rely on MySQL as their products' embedded database to make their applications, hardware and appliances more competitive, bring them to market faster, and lower their cost of goods sold. Learn More » MySQL Cluster CGE MySQL Cluster enable...
I don't use MySQL extensively, but I use the code within MySQL for preparing some reports and all that. What is most valuable? Code is easy to write and code, it's easy to understand. That's why it's widely used. The queries are very easy to understand and [write the] code. Fo...
如果您也已啟用 log_queries_not_using_index 參數,這會指定用來記錄預期擷取所有數據列的查詢,可能會沒有説明。 執行完整索引掃描的查詢會利用索引,但是會記錄它們,因為索引不會限制傳回的數據列數目。從記錄擷取資訊記錄最多可以從建立開始算起保留七天。 您可以透過 Azure 入口網站或 Azure CLI 列出並下載慢速查詢...
SafeMySQL is a PHP class for safe and convenient handling of MySQL queries.Safe because every dynamic query part goes into the query via placeholder Convenient because it makes application code short and meaningful, without useless repetitions, making it ''extra'' DRY...
log-slow-queries [= file] 把执行用时超过long_query_time变量值的查询命令记入日志(慢查询日志); 如果没有给出file参数,MySQL将在数据库目录里创建一个hostname-slow.log文件作为这种日志文件(hostname是服务器主机 名)。 long_query_time = n 慢查询的执行用时上限(默认设置是10s)。 long_queries_not_usin...
Why do we need a self-written class for MySql if PHP has a PDO abstraction and a mysqli extension?The main disadvantages of all libraries for working with the mysql database in PHP are:Verbosity Developers have two options to prevent SQL injections: Use prepared queries. Manually escape ...
During full data synchronization, DTS uses the read and write resources of the source and destination databases. This may increase the load on the database servers. You can configure theQueries per second (QPS) to the source database,RPS of Full Data Mi...
The only SQL change for associating the parser with the index is theWITH PARSERclause. Searches are specified as before, with no changes needed for queries. When you associate a parser plugin with aFULLTEXTindex, the plugin is required for using the index. If the parser plugin is dropped, ...
To demonstrate how extended regular expressions work, the LIKE queries shown previously are rewritten here to use REGEXP. To find names beginning with b, use ^ to match the beginning of the name: mysql> SELECT * FROM pet WHERE name REGEXP '^b'; +---+---+---+---+---+---+...
log_throttle_queries_not_using_indexes:限制可写入慢查询日志的非索引查询的数目。 当log_queries_not_using_indexes设置为 ON 时,此参数生效 重要 如果表未编制索引,则将log_queries_not_using_indexes和log_throttle_queries_not_using_indexes参数设置为 ON 可能会影响 MySQL 性能,因为对这些非索引表运行的所有...