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500 words explain the SQL commands, UNION, INTERSECT, and MINUS Inc

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500 words explain the SQL commands, UNION,
INTERSECT, and MINUS. Include concepts like union-
compatibility, syntax alternatives like IN and NOT IN,
various JOIN options.
Solution
500 words explain the SQL commands, UNION,
INTERSECT, and MINUS. Include concepts like union-
compatibility, syntax alternatives like IN and NOT IN,
various JOIN options.
Union is a Sql operator or clause that combines the result
of 2 or more Select statements without returning any
duplicate rows. While using UNION operator the columns
in the each select statement must be equal (same number
of columns, similar data types). It selects only distinct
values by default.
Syntax: SELECT column_name(s) FROM table1
UNION SELECT column_name(s) FROM table2;
Intersect is a sql operator or clause that combines two
select statements and returns the rows that are identical to
a row in the second SELECT statement only from the first
SELECT statement. MySql Server does not support

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INTERSECT operator.
Syntax: SELECT column1 [, column2] FROM table1 [,
table2] [WHERE condition] INTERSECT SELECT column1
[, column2] FROM table1 [, table2] [WHERE condition]
Minus operator is used to return all rows in the first
SELECT statement that are not returned by the second
SELECT statement. Each SELECT statement will define a
dataset. The MINUS operator will retrieve all records from
the first dataset and then remove from the results all
records from the second dataset.
Syntax:
SELECT expression1, expression2, ... expression_n FROM
tables [WHERE conditions] MINUS SELECT expression1,
expression2, ... expression_n FROM tables [WHERE
conditions];
->If component queries select character data, then the
datatype of the return values are determined as follows:
-> If component queries select numeric data, then the
datatype of the return values is determined by numeric
precedence:
IN operator allows to specify multiple values in a WHERE
clause.
Syntax: SELECT column_name(s)
FROM table_name
WHERE column_name IN (value1,value2,...);

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500 words explain the SQL commands, UNION, INTERSECT, and MINUS. Include concepts like union compatibility, syntax alternatives like IN and NOT IN, various JOIN options. Solution 500 words explain the SQL commands, UNION, INTERSECT, and MINUS. Include concepts like unioncompatibility, syntax alternatives like IN and NOT IN, various JOIN options. Union is a Sql operator or clause that combines the result of 2 or more Select statements without returning any duplicate rows. While using UNION opera tor the columns in the each select statement must be equal (same number of columns, similar data types). It selects only distinct values by default. Syntax: SELECT column_name(s) FROM table1 UNION SELECT column_name(s) FROM table2; Intersect is a sql operator or clause that combines two select statements and returns the rows that are identical to a row in the second SELECT statement only from th ...
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