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.
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
As for your example, in MySQL these two queries are others.
Also, note that MySQL also has a
Using this clause, you can control the
You cannot control this in MySQL using
WHERE syntax. and other
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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)
Do these two type of queries work on the same way in
MySQL? helpful ?