I’m a newbie in HIVE. I want to include 0 rows in results I have one table like this is my query example result is but my desired result is How can I get a 0 in results? Answer You can do this but you need to remove where clause. You can also do using self join. EDIT – I
Tag: hiveql
LEFT JOIN by closer value condition
I have this query In the second LEFT JOIN, I would like to change the second condition pob.year = proc.anno_eleccion so that it does not only search for the exact year when joining. Instead, I would like to get the closer year stored in my pob table. For example, the first year stored in pob is 2003, so I want
Hive Union of two queries is giving compile error
I am not sure what is wrong with following hive query. However, it’s throwing error. I am able to run this queries individually. However, facing issues while running with union Error Answer Hive versions prior to 1.2.0 only support UNION ALL Workaround: Use UNION ALL instead of UNION, wrap all into subquery and apply distinct UNION is the same as
Want to convert timestamp to date format in hive
want to convert this number ‘20210412070422’ to date format ‘2021-04-12’ in hive I am trying but this returns null value from_unixtime(unix_timestamp(eap_as_of_dt, ‘MM/dd/yyyy’)) Answer The best methoid is to do without unix_timestamp/from_unixtime if possible and in your case it is possible. date() can be removed, string in yyyy-MM-dd format is compatible with date type: Result: Another efficient method using regexp_replace: If
Hive SQL cast string as timestamp without losing the milliseconds
I have string data in the form 2020-10-21 12:49:27.090 I want to cast it as a timestamp. When I do this: select cast(column_name as timestamp) as column_name from table_name all of the milliseconds are dropped, like this: 2020-10-21 12:49:27 I also tried this: select cast(date_format(column_name,’yyyy-MM-dd HH:mm:ss.SSS’) as timestamp) as column_name from table_name and the same problem persists, it drops the
How to UPDATE a value in hive table?
I have a flag column in Hive table that I want to update after some processing. I have tried using hive and impala using the below query but it didn’t work, and got that it needs to be a kudu table …
In Hive, how to read through NULL / empty tags present within an XML using explode(XPATH(..)) function?
In below Hive-query, I need to read the null / empty “string” tags as well, from the XML content. Only the non-null “string” tags are getting considered within the XPATH() list now….
Hive QL Declaration
What is the difference between CHAR() and VARCHAR() declarations from HQL?
Filtering records not containing numbers
I have a table that has numbers in string format. Ideally the table should contain 10 digit number in string format, but it has many junk values. I wanted to filter out the records that are not ideal …
Create Missing Data Hive SQL
I have a table that has an activity date of when things change such as 2020-08-13 123 Upgrade 2020-08-17 123 Downgrade 2020-08-21 123 Upgrade Basically this in relation to a line there are 3 …