I want to find previous date in Hive. For example : I have Date as 20180821 (yyyyMMdd) format, I want to find previous date of this in Hive. I tried date_sub() function, seems it works only with yyyy-MM-dd format. How to solve my issue. Please help Answer In addition to already provided solution with unix_timestamp conversion, please consider also this.
Tag: sql
Return first order by each month
I am trying to modify my current query to return the first order for each month in each year. Here is my full table and my current query. select orderdate, sum(UnitPrice*Qty) AS …
How do you return the max of a column (Text field)? [closed]
I can not find a way to execute the following simple query: SELECT max(@SomeCol) FROM test_table; I can do just about everything else except for that, max doesn’t return what I expect.
php query function repeating data
I am trying to make a facebook style chat page using php and mysql. But i have a problem with my query result. The chat table looks like this. And i write this function for getting the message for …
Grabbing certain columns from the rows that the MAX value occurred
So i am trying to insert only the rows that are correlated to the HOUR where the MAX value occurred . However I am grouping by Day, and later on will be grouping on week, month, year, etc. Is my …
How to join single table with multiple columns in Hive?
I have 2 tables: one has exchange rates (to GBP), the other has various amount columns with different currencies. I am joining these two tables and display all amount values in GBP, but I get nulls …
case statement in index creation
How do i use a CASE statement when creating a UNIQUE INDEX? My statement looks like this CREATE UNIQUE INDEX my_unique_creation ON junk ((CASE WHEN nlevel(path) > 1 THEN (…
How should I pass values into JPQL query?
I’m working on test, that will check if object had been saved into database. Test will save object with unique values and after that I want to fetch this object from database and check if it is not …
Fast SQL record look-up by using hash in Python/pandas
I’m looking to maintain a (Postgres) SQL database collecting data from third parties. As most data is static, while I get a full dump every day, I want to store only the data that is new. I.e., every …
Using COUNT in INNER JOIN in SQLite (to count absent records)
In SQLite, I have a table named Items: | id | name | |—-|——-| | 1 | .. | | 2 | .. | | 3 | .. | | 4 | .. | | 5 | .. | | 6 | .. | Each item might have tags associated …