SUBTRACT()
All functions > DATE AND TIME > SUBTRACT()
Subtracts an interval from a timestamp or date, or returns the interval between two timestamps or two dates.
Signatures
Date and time subtraction
Returns: Timestamp after subtracting an interval, or the interval between two datetimes
SUBTRACT(minuend: TIMESTAMP or DATE, subtrahend: INTERVAL, TIMESTAMP, or DATE) → TIMESTAMP or INTERVALsql
| Parameter | Type | Required | Description |
|---|---|---|---|
minuend | TIMESTAMP or DATE | Yes | Timestamp or date to subtract from |
subtrahend | INTERVAL, TIMESTAMP, or DATE | Yes | Interval to subtract, or another timestamp/date whose difference is taken |
Signature notes:
timestamp - intervalordate - interval→ TIMESTAMPtimestamp1 - timestamp2ordate1 - date2→ INTERVAL- Returns NULL if either operand is NULL
Related operators
Examples
SUBTRACT(...)
FeatureQL
SELECT
f1 := SUBTRACT(10, 3) -- Function call
;Result
| f1 BIGINT |
|---|
| 7 |
.SUBTRACT(...) — chained
FeatureQL
SELECT
f1 := (10).SUBTRACT(3), -- Integer literal: use parentheses for `.SUBTRACT` on a BIGINT value
f2 := 10.0.SUBTRACT(3) -- Decimal base: chain without extra parentheses
;Result
| f1 BIGINT | f2 VARCHAR |
|---|---|
| 7 | 7.0 |
Date and time
FeatureQL
SELECT
f1 := TIMESTAMP '2021-01-02'.SUBTRACT(INTERVAL '1 DAY'), -- Chained subtract on a timestamp
f2 := TIMESTAMP '2021-01-02'.SUBTRACT(TIMESTAMP '2021-01-01') -- Interval between two timestamps via chained call
;Result
| f1 TIMESTAMP | f2 VARCHAR |
|---|---|
| 2021-01-01T00:00:00 | 1 days |
Edge cases
FeatureQL
SELECT
f1 := SUBTRACT(5, 5), -- Equal operands
f2 := SUBTRACT(1, 7), -- Negative result
f3 := SUBTRACT(0, -5) -- Subtracting a negative
;Result
| f1 BIGINT | f2 BIGINT | f3 BIGINT |
|---|---|---|
| 0 | -6 | 5 |