SQL
Built-In Timestamp with Time Zone Functions
The table below shows the available scalar functions for `TIMESTAMPTZ` values.
Since these functions do not involve binning or display,
they are always available.  
| Name | Description |
|:--|:-------|
| [`current_timestamp`](#::current_timestamp) | Current date and time (start of current transaction). |
| [`get_current_timestamp()`](#::get_current_timestamp) | Current date and time (start of current transaction). |
| [`greatest(timestamptz, timestamptz)`](#::greatesttimestamptz-timestamptz) | The later of two timestamps. |
| [`isfinite(timestamptz)`](#::isfinitetimestamptz) | Returns true if the timestamp with time zone is finite, false otherwise. |
| [`isinf(timestamptz)`](#::isinftimestamptz) | Returns true if the timestamp with time zone is infinite, false otherwise. |
| [`least(timestamptz, timestamptz)`](#::leasttimestamptz-timestamptz) | The earlier of two timestamps. |
| [`now()`](#::now) | Current date and time (start of current transaction). |
| [`transaction_timestamp()`](#::transaction_timestamp) | Current date and time (start of current transaction). |