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MySQL -- pt-osc tool learning, mysql -- pt-osc Tool ##=================================================== ====================== ##Pt-osc workflow:1. Check whether the table has a primary key or a unique index and whether a trigger exists.2. Check the TABLE structure of the modified TABLE, create a temporary TABLE, and execute the alter table statement on the new TABLE.3. Create Three triggers on the source

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):Every query has a query ID, and this ID is calculated by hash. Pt-query-digest is based on the so-called fingerprint group by. For example, the fingerprint of the following two queries is the same as the select * FROM table1 where column1 =?, the Toolbox also has a related tool pt-fingerprint.SELECT * FROM table1 where column1 = 2select * FROM table1 where column1 = 3 Rank the "statement" in the entire analysis, generally the most common pe

Database Operation Tool class, for your reference. Package com.itjh.javaUtil; Import java.sql.Connection; Import Java.sql.DriverManager; Import java.sql.PreparedStatement; Import Java.sql.ResultSet; Import Java.sql.ResultSetMetaData; Import java.sql.SQLException; Import java.util.ArrayList; Import java.util.Collections; Import Java.util.HashMap; Import java.util.List; Import Java.util.Map; Import Org.apache.commons.dbcp.ConnectionFactory; Import Or

How to Use the built-in tools in win7 ?, Built-in win7 tools What methods do you usually use? Is the PrintScreen SysRq key on the keyboard or the QQ built-in tool Ctrl + Alt +? Today, we will introduce another tool that comes with win 7. Step 1: Start the "tool" It is easy to start the tool. Click the Start menu and

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The following is organized from the second edition of Master HibernateHibernate provides a conversion tool from the mapping file to the Java source code, called the Hbm2java tool, which can be used to run it using the Ant tool. The above code defines a hbm2javatask task whose Destdir attribute specifies that the Java source file is stored in the ${source.root} di