Illustrates the JOIN commands
Illustrates the JOIN commands?
Expert
JOIN:
• It is the form of SELECT command which combines info by two or more tables.
• Kinds of Joins are Simple (that are Equijoin and Non-Equijoin), Outer and Self join.• Equijoin returns rows by two or more tables combined together based on an equality condition within the WHERE clause.
• Non-Equijoin returns rows by two or more tables based on a relations other than the equality condition within the WHERE clause.
• Outer Join combines two or additional tables returning which rows from one table which have no direct match within the other table.
• Self Join joins a table to itself like though that were two separate tables.
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