COMPUTER SCIENCE AND ENGINEERING
SQL
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Inner-Joins are the least frequent types of joins
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In SQL joins, the ANSI syntax is more popular than the Standard-SQL syntax
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SQL joins can produce valid output if there are common columns and values on 2 or more tables
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Inner-Joins are opposite of Equijoins
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Detailed explanation-1: -There are four main types of JOINs in SQL: INNER JOIN, OUTER JOIN, CROSS JOIN, and SELF JOIN.
Detailed explanation-2: -Q 30-Which of the following is true about SQL joins? A-The join condition is not separated from other search conditions in a query. B-The ON clause makes code difficult to understand. C-The join condition for natural join is basically an equijoin of all columns with same name.
Detailed explanation-3: -Inner Join clause in SQL Server creates a new table (not physical) by combining rows that have matching values in two or more tables. This join is based on a logical relationship (or a common field) between the tables and is used to retrieve data that appears in both tables.
Detailed explanation-4: -A JOIN clause is used to combine rows from two or more tables, based on a related column between them.