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Does anyone know tools which look at a MySQL database, show you all the tables graphically and allow you to create complicated JOIN statements via drag-and-drop?
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Ans: Joining two tables in SQL can be done in four major ways: Inner Join (returns rows with matching columns), Left Join (ALL records in the left table and matching records in the right table), Right Join (ALL records in the right table and matching records in the left table), and Union (removes duplicates).
performance - Mysql - LEFT JOIN way faster than INNER JOIN - Stack Overflow.
Relational algebra is the most common way of writing a query and also the most natural way to do so. The code is clean, easy to troubleshoot, and unsurprisingly, it is also the most efficient way to join two tables.
MySQL supports the following types of JOIN clauses: INNER JOIN, OUTER JOIN, and CROSS JOIN. OUTER JOINs can further be divided into LEFT JOINs and RIGHT JOINs. To better demonstrate how the JOINs work, we will create two tables.
Before you buy anything, see if the free, official MySQL's GUI tools (specifically the MySQL Query Browser) will work for you.
Personally, I'm fairly comfortable interacting with MySQL's command line interface and haven't used their GUI tools very much, but I just downloaded Query Browser and it seems like it does exactly what you're looking for.
Also, check out "Building Queries Visually in MySQL Query Browser" for a nice tour of MySQL Query Browser.
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