inner join on where in clause

Hello Dev, In this post Inner Join On Where In Clause on INNER JOIN is ANSI syntax that you use.

It is generally considered more readable, seeable, editable no especially when you join lots of tables.

It can also be easily and simplited replaced with an OUTER JOIN whenever a need arises.

The WHERE clause syntax is more relational model oriented.

A result of two tables JOINed is a substype of a cartesian product of the tables to which a filter is applied which selects only those rows with joining columns matching.

It’s easier to see this with the WHERE syntax.

As for your example, in MySQL these two queries are others.

Also, note that MySQL also has a STRAIGHT_JOIN clause.

Using this clause, you can control the JOIN order:

You cannot control this in MySQL using WHERE syntax. and other

People Also Ask

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You Can Do 1:

SELECT
    table1.this, table2.that, table2.somethingelse
FROM
    table1, table2
WHERE
    table1.foreignkey = table2.primarykey
    AND (some other conditions)

You can Do 2:

SELECT
    table1.this, table2.that, table2.somethingelse
FROM
    table1 INNER JOIN table2
    ON table1.foreignkey = table2.primarykey
WHERE
    (some other conditions)
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Do these two type of queries work on the same way in MySQL? helpful ?

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