Implicit Join Syntax MySQL | MySQL full course | Full tutorial for beginners | #revildo_code

Implicit Join Syntax MySQL | MySQL full course | Full tutorial for beginners | #revildo_code

Joins can also be performed by having several tables in the from clause, separated with commas , and defining the relationship between them in the where clause. This technique is called an Implicit Join (since it doesn't actually contain a join clause). All RDBMSs support it, but the syntax is usually advised against.

The implicit join syntax is “old-style” syntax, where each join operation is defined implicitly via the WHERE clause, using the so-called join columns (see the second statement in Example 6.57). Note – Use of the explicit join syntax is recommended. This syntax enhances the readability of queries.

To express joins such as 'Explicit Join Notation' and 'Implicit Join Notation' two different syntactical ways are defined in SQL. In 'Explicit Join Notation', ON keyword is used to specify the predicates for Join and JOIN keyword is used to specify the table to join.

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