---
name: "left_unary"
section: "7nr"
platform: "linux"
package: "postgres95"
version: "1.01-1"
release: "Debian 1.2 (Rex)"
platforms: ["linux"]
url: "https://new.carta.tech/left_unary"
---

# left\_unary(7nr)

- **Type** **Operator** **POSTGRES Function Prototype**

  **Operation**

- box @@ point box\_center(box)

  center of box

- float4 @ float4 float4abs(float4)

  absolute value

- float8 @ float8 float8abs(float8)

  absolute value

- % float8 dtrunc(float8)

  truncate to integer

- \|/ float8 dsqrt(float8)

  square root

- \|\|/ float8 dcbrt(float8)

  cube root

- : float8 dexp(float8)

  exponential function

- ; float8 dlog1(float8)

  natural logarithm

- tinterval \| abstime intervalstart(tinterval)

  start of interval