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MySQL Select Database. Summary: in this tutorial, you will learn how to select a MySQL database using the USE command from the MySQL Command Line tool and MySQL Workbench. After connecting to the MySQL instance, you need to select a particular database to start working with.
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26 lut 2010 · SELECT settingValue FROM config WHERE settingKey=`MasterPassword`. With a MyISAM table, this query will have the same performance be the settingKey a PRIMARY KEY or a secondary index. With an InnoDB table, this query will most probably be faster if settingKey is a secondary index.
26 sty 2024 · This tutorial guides you through the steps to select and interact with a MySQL database using the CLI. We cover basic commands and work our way up to more advanced techniques, illustrating outputs and providing best practices.
SELECT Syntax. SELECT column1, column2, ... FROM table_name; Here, column1, column2, ... are the field names of the table you want to select data from. If you want to select all the fields available in the table, use the following syntax: SELECT * FROM table_name;
12 lut 2016 · SELECT b.*, a.name FROM tableB AS b INNER JOIN tableA as A ON (b.id=a.id); This query will return everything from Table B and name from Table A where the ID from Table B is the same as the ID from Table A.
This tutorial shows you various ways to select a MySQL database via the mysql program and MySQL Workbench application by using the USE statement.
SELECT is used to retrieve rows selected from one or more tables, and can include UNION operations and subqueries. INTERSECT and EXCEPT operations are also supported. The UNION, INTERSECT, and EXCEPT operators are described in more detail later in this section. See also Section 15.2.15, “Subqueries”.
