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  1. REFERENCE
  2. SQL Reference
  3. SQL Functions
  4. Conditional

COALESCE

Evaluates the arguments in order and returns the value of the first expression that does not contain NULL.

Syntax

COALESCE(expression1, expression2, [ …, expressionN ]) → same as input type

  • expression: A combination of symbols and operators that the database evaluates to obtain a single data value. Expressions can be a single constant, variable, column, or scalar function.

Examples

COALESCE example
SELECT COALESCE(address1, address2, city, state, zipCode)
FROM customers

-- 123 Main Street

Usage Notes

All arguments in the SELECT statement must have the same data type. Requires a minimum of two arguments, but there is no set maximum limit.

Last updated 2 years ago

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