$showquery = "SHOW TABLE STATUS LIKE 'tablename'"; if(!$conn) { echo "Unable to connect to the Database"; } else { mysql_select_db("databasename", $conn); $result = mysql_query($showquery); while($array = mysql_fetch_array($result)) ...
The updated query example results in a Visual Explain image in which Index Range Scan replaces the Full Table Scan generated by the last query example. The next two figures show the visual and tabular representations of the modified query example. ...
root@localhost: test07:49:24>show profile cpu, block ioforquery6;+---+---+---+---+---+---+|Status|Duration|CPU_user|CPU_system|Block_ops_in|Block_ops_out|+---+---+---+---+---+---+|starting|0.000349|0.000000|0.000000|0|0||Opening tables|0.000012|0.000000|0.000000|...
To see what indexes a table has, use SHOW INDEX FROM tbl_name. • key (JSON name: key) The key column indicates the key (index) that MySQL actually decided to use. If MySQL decides to use one of the possible_keys indexes to look up rows, that index is listed as the key value....
phpMyAdmin Run MySQL Query Tutorial Table of Contents Execute MySQL queries with the SQL tab Construct and execute MySQL queries with the Query tab This tutorial explains how to execute MySQL queries using the phpMyAdmin tool. There are two ways to do that with the phpMyAdmin interface. ...
The example also shows how to use EXPLAIN to verify that the query can be offloaded, and how to force query execution on the MySQL DB System to compare MySQL DB System and HeatWave query execution times. The table used in this example: mysql>USE tpch; mysql>SHOW CREATE TABLE orders; ...
查看记录中第一条SQL详细时间:show profile for query 1; 2. 通过type指定显示其他信息 我们看一下官方提供的profile语法: AI检测代码解析 SHOW PROFILE [type [, type] ... ] [FOR QUERY n] [LIMIT row_count [OFFSET offset]] type: { ALL 显示所有信息 ...
mysq show processlist 指定数据库 mysql show profile for query,MySQLQueryProfiler,可以查询到此SQL语句会执行多少,并看出CPU/Memory使用量,执行过程Systemlock,Tablelock花多少时间等等.从启动Profile之后的所有查询包括错误语句都会被记录。mysql的sql语句优化也可以
is the same bug report. > In order to get that info, we need extended EXPLAIN outputs for that query with both releases. Please, use the default TABLE format output, since there is a bug in other outputs, when dealing with hash joins. Can you please show me how to produce this ...
I made quite a complex View on my MySQL database, and I realized that some queries are slow. My first idea was to add indexes but it's not possible to do on a view so I'm lost on how to improve the performance of my query. I'll share here my View query, and I'll do my...