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Numeric functions (Logarithmic)

LN¶

Returns the natural logarithm of a numeric expression.

Syntax¶

LN(<expr>)
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Usage notes¶

  • Always returns a floating point number, even if the input expression is of type integer.

  • If the input expression is less than or equal to 0, an error is returned.

Examples¶

SELECT x, ln(x) FROM tab;

--------+-------------+
   X    |    LN(X)    |
--------+-------------+
 1      | 0           |
 10     | 2.302585093 |
 100    | 4.605170186 |
 [NULL] | [NULL]      |
--------+-------------+
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