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Tag: hive

Repeat previous values by date in hive

I have 2 tables – Dates and Data with data as follows: Table: Dates Table: Data Expected results: I have tried using PARTITION OVER but getting duplicate vales and not all dates from Dates table, therefore not getting desired results. Really appreciate if you can help with the code in Hive SQL. Answer Use a cross join to generate the

Using Case WHEN to extract with first character

I am using case as an if else statement in my hive database, it seems it is not showing what i am trying to extract as. i am using this script in logical concept if at character 44 starts with _ , substring at 45 , else substring at 45 e.g (table look like ) am i using like statement

HIVE SQL: Select rows whose values contain string in a column

I want to select rows whose values contain a string in a column. For example, I want to select all rows whose values contain a string ‘123’ in the column ‘app’. table: result: I am not familiar with SQL query. Could anyone help me? . Thanks in advances. Answer In a number of ways: like: rlike: instr: locate: Invent your

Using row_number update column value using previous row value

I have a table in hive contents are below Now I want to update the to_d column where row_num > 1 using some conditions like below Please don’t get me wrong I am just trying to help one of the other user’s question Updating column values based on the other table values in hive tables I was trying this approach

Hive nested query left join

I’am new to hive and i want to implement the following query It works fine untill the last left join. Nested queries are obviously not authorized in hive. How can i approach this. Answer Use sub-query instead of joined table: Or better move last join condition inside the WHERE clause in the subquery:

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