from_unixtime function
Applies to: 
Databricks SQL Databricks Runtime
Returns unixTime in fmt.
Syntax
from_unixtime(unixTime [, fmt])
Arguments
unixTime: A BIGINT expression representing seconds elapsed since 1969-12-31 at 16:00:00.- fmt: An optional STRING expression with a valid format.
Returns
A STRING.
See Datetime patterns for valid formats. The 'yyyy-MM-dd HH:mm:ss' pattern is used if omitted.
Examples
SQL
> SET TIMEZONE 'UTC';
> SELECT from_unixtime(0, 'yyyy-MM-dd HH:mm:ss');
1970-01-01 00:00:00
> SELECT from_unixtime(0);
1970-01-01 00:00:00