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36 lines
820 B
Markdown
36 lines
820 B
Markdown
---
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slug: /en/sql-reference/functions/comparison-functions
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sidebar_position: 36
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sidebar_label: Comparison
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---
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# Comparison Functions
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Comparison functions always return 0 or 1 (Uint8).
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The following types can be compared:
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- numbers
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- strings and fixed strings
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- dates
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- dates with times
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within each group, but not between different groups.
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For example, you can’t compare a date with a string. You have to use a function to convert the string to a date, or vice versa.
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Strings are compared by bytes. A shorter string is smaller than all strings that start with it and that contain at least one more character.
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## equals, a = b and a == b operator
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## notEquals, a != b and a \<\> b operator
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## less, \< operator
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## greater, \> operator
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## lessOrEquals, \<= operator
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## greaterOrEquals, \>= operator
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