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Compares a string expression to a pattern in an SQL expression.
SyntaxRemarksexpressionLike “pattern”
The Like operator syntax has these parts:
Part
Description
expression
SQL expression used in a WHERE clause .
pattern
String or character string literal against which expression is compared.
You can use the Like operator to find values in a field that match the pattern you specify. For pattern, you can specify the complete value (for example,
Like “Smith”), or you can use wildcard characters to find a range of values (for example,Like “Sm*”).In an expression, you can use the Like operator to compare a field value to a string expression. For example, if you enter
Like “C*”in an SQL query, the query returns all field values beginning with the letter C. In a parameter query, you can prompt the user for a pattern to search for.The following example returns data that begins with the letter P followed by any letter between A and F and three digits:
Like “P[A-F]###”The following table shows how you can use Like to test expressions for different patterns.
Kind of match
PatternMatch
(returns True)No match
(returns False)Multiple characters
a*a
aa, aBa, aBBBa
aBC
*ab*
abc, AABB, Xab
aZb, bac
Special character
a[*]a
a*a
aaa
Multiple characters
ab*
abcdefg, abc
cab, aab
Single character
a?a
aaa, a3a, aBa
aBBBa
Single digit
a#a
a0a, a1a, a2a
aaa, a10a
Range of characters
[a-z]
f, p, j
2, &
Outside a range
[!a-z]
9, &, %
b, a
Not a digit
[!0-9]
A, a, &, ~
0, 1, 9
Combined
a[!b-m]#
An9, az0, a99
abc, aj0
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This tutorial introduces you to the SQL comparison operators and shows you how to use them to form conditions for filtering data.
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Comparison operators in SQL are used to compare two values and determine if they meet specific criteria. These operators are essential for filtering data in SQL queries, especially within the WHERE clause. Here are the primary comparison operators in SQL:
Equal to (=) Operator
The equal to operator checks if the values of two operands are equal. It returns true if the values are the same, otherwise false. For example:
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Not Equal to (<>) Operator
The not equal to operator checks if the values of two operands are not equal. It returns true if the values are different, otherwise false. For example:
SELECT * FROM employees WHERE department_id <> 8;This query retrieves all employees whose department ID is not 82.
Greater than (>) Operator
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