Operator Precedence : Query Select « Query « SQL Server / T-SQL Tutorial

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SQL Server / T-SQL Tutorial » Query » Query Select

1. 1. 4. Operator Precedence


Precedence      Operator(s)

1               0(parentheses)

2               + (Positive), - (Negative), ~ (Bitwise NOT)

3               * (Multiply), / (Divide), % (Modulo)

4               + (Add), (+ Concatenate), - (Subtract)

5               =, >, <, >=, <=, <>, !=, !>, !< (Comparison operators)

6               ^ (Bitwise XOR), & (Bitwise AND), | (Bitwise OR)

7               NOT

8               AND

9               ALL, ANY, BETWEEN, IN, LIKE, OR, SOME

10              = (Assignment)

1. 1. Query Select
	1. 1. 1.	The basic syntax of the SELECT statement
	1. 1. 2.	The operators you can use in a search condition
	1. 1. 3.	Both uppercase and lowercase statements are acceptable, a query could be written as follows:
	1. 1. 4.	Operator Precedence
	1. 1. 5.	asterisk (*) specifies all columns of the named tables in the FROM clause
	1. 1. 6.	A SELECT statement that retrieves rows with non-zero values
	1. 1. 7.	A SELECT statement that retrieves two columns and a calculated value for a specific Billing
	1. 1. 8.	retrieve specific columns
	1. 1. 9.	A SELECT statement that retrieves three columns from each row, sorted in descending sequence by Billing total
	1. 1. 10.	A SELECT statement that returns an empty result set
	1. 1. 11.	SELECT 1.0 + 3.0 / 4.0 -- Returns 1.75
	1. 1. 12.	SELECT (1.0 + 3.0) / 4.0 -- Returns 1.00
	1. 1. 13.	The specification column_name [as] column_heading
	1. 1. 14.	Table alias
	1. 1. 15.	add a WHERE clause and group by
	1. 1. 16.	A SELECT statement that uses the CHAR function to format output
	1. 1. 17.	Use local variable in a select statement
	1. 1. 18.	Using SELECT to Create a Script

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