I've seen discussions involving slightly different definitions, so here are two.
1. A complex join involves the joining of more than 2 tables and a filter - also known as a mutable join with a filter.
2. A join that has a conditional statement such as <, >, Not, >=, <=, etc. instead of =.
Inner Join
Cross Join is jsut another Join
Left Inner Join will be faaster
join combine the two table to gv a resultant set
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A Join SQL clause is a combination of two or more tables from a database. Fields are joined by using data that is present in both tables and are written as an identification for the join.
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A SQL join clause combines records from two or sometimes more than two tables in to a database. This creates a set that can be used as it is or can be saved as a table.
glue
In a procedural language, like PL/SQL, the programmer specifies the steps to be taken to accomplish a task, while in a non-procedural language, like SQL, the programmer specifies what needs to be done rather than how to do it. In the context of a DBMS, procedural languages are used for developing complex logic and operations within the database, while non-procedural languages are used for querying and manipulating data.
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ANSI SQL is the American National Standards Institute standardized Structured Query Language. ANSI SQL is the base for several different SQL languages such as T-SQL and PL/SQL. ANSI SQL is used to Create, Alter, and View data stored within a database. For more information about ANSI: http://www.ansi.org/ For more information about SQL: http://en.wikipedia.org/wiki/SQL