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if my table data is inserted into 10 buckets, is it possible to delete any bucket from hive CLI eg: delete bucket 4 ?
No It is DDL .
Metadata should be updated in that case You have to drop table and reinsert data into the table .
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Here is a snapshot of some of the data I am trying to extract only the month and place this into a new table. This is in SQL.
select month(convert(date,<table_date>,101))
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I have a decent-sized table 'countries' with about 10 columns. I recently added a new column to the table 'GDP' and I am entering the information per row using
UPDATE countries
SET GDP=(value)
WHERE name = (country);
I have 200 countries in this table. Is there a better way to update this information?
This project is from Khan Academy. We are asked to select a database and run queries on it. The data was pulled from https://gist.github.com/pamelafox/ad4f6abbaac0a48aa781
I am just making sure that there isn't a more efficient way of adding this information to the existing table 'countries' where the primary key is the name of the country.
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I was asked on my apprenticeship following question:
Why query like:
FOR i in ( SELECT * FROM TABELKA) LOOP
is not efficient? How to change it to make it more efficient?
There is no further information added.
Collect, all data at once, into a collection. Boom! One query and you have it all without looping.
SELECT *
BULK COLLECT INTO a_collection_type_variable
FROM a_table;
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Can you help me to delete all characters > 70 in a "Title" column in dbo.tabs with a SQL script?
update dbo.Tabs
set Title = substring(Title,1,70);
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My table name is SOFTSKILL. One of Columns is MakeID. The values in the column are,
000277755
000278143
000277738
000277051
i need to change 000 into 100, like
100277755
100278143
100277738
100277051
Anybody please help me how to do this..
UPDATE SOFTSKILL
SET MakeId = STUFF(MakeId,1,1,'1')
WHERE MakeId LIKE '000%'