presto
How do I escape a single quote in Presto?
The answer, provided by a_horse_with_no_name, is to use another ‘. ‘Driver”s License’
Why Presto is faster than Spark SQL [closed]
In general, it is hard to say if Presto is definitely faster or slower than Spark SQL. It really depends on the type of query you’re executing, environment and engine tuning parameters. However, what I see in the industry(Uber, Neflix examples) Presto is used as ad-hock SQL analytics whereas Spark for ETL/ML pipelines. One possible … Read more
Presto equivalent of MySQL group_concat
Try using this in place of group_concat in Presto :: select a, array_join(array_agg(b), ‘,’) from table group by a
Presto/Trino – static date and timestamp in where clause
Unlike some other databases, Trino doesn’t automatically convert between varchar and other types, even for constants. The cast works, but a simpler way is to use the type constructors: WHERE segment=”2557172″ AND date = date ‘2016-06-23’ AND count_time BETWEEN timestamp ‘2016-06-23 14:00:00.000’ AND timestamp ‘2016-06-23 14:59:59.000’ You can see examples for various types here: https://trino.io/docs/current/language/types.html
Presto – static date and timestamp in where clause
Unlike some other databases, Presto doesn’t automatically convert between varchar and other types, even for constants. The cast works, but a simpler way is to use the type constructors: WHERE segment=”2557172″ AND date = date ‘2016-06-23’ AND count_time BETWEEN timestamp ‘2016-06-23 14:00:00.000’ AND timestamp ‘2016-06-23 14:59:59.000’ You can see examples for various types here: https://prestosql.io/docs/current/language/types.html
Presto SQL – Converting a date string to date format
I figured it out. The below works in converting it to a 24 hr date format. select date_parse(‘7/22/2016 6:05:04 PM’,’%m/%d/%Y %h:%i:%s %p’) See date_parse documentation in Presto.