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I have about 1000 entries in table. It's simple table with 10 columns. Query:
SELECT * FROM my_table
server runs the query, but is processing it for a long time.
P.S. I know this is not enough info, so please comment and I will add what is needed.
Got it. Not related to SQL. Server got overflown by data. Someone was spamming it.
You can try to use TOP. For example try to select 100 rows and look if server still stucks:
SELECT TOP 100 * FROM my_table
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How does one get the first name info from a Users table, which has a first name column?
First of all welcome to the community. I suggest you read the guidelines on how to properly ask a question here and you might want to write a title that is relevant to your question.
Now to the question:
Assuming tblUsers is a table in your database and 'first_name' is a column in your table, you can use SELECT followed by the column you want to select.
Lastly, add FROM to select which table you want to select from.
So in your case it would be:
SELECT first_name FROM tblUsers;
You can read more about SELECT here
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how can i access multiple my sql database at time, what is the mechanism behind it?????
eg: i have three different database that contain product(shoes) along with price and there description etc...
so whenever the user type shoes and set its price ... my search bar should be able to retrieve the data in respect of price.. from multiple database..
You can use like
Select * FROM database1.products WHERE field = ?
UNION ALL
SELECT * FROM database2.products field = ?
UNION ALL
SELECT * FROM database3.products field = ?
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I have a specific column, called DELIVER_TO_LOCATION_ID , which is in a table called apps.po_requisition_lines_all
I need to dig into the database and derive the continent from the DELIVER_TO_LOCATION_ID ,
In SQL Developer I can't seem to find a way to do this .
any tips appreciated. thanks
You can use following command-
desc tableName
It'll give you description of table including every column in it having any constraints on it or not like primary key, reference key etc.
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I want to make auto changes in SQL Server. I have a table which has a column [expires date]. Should I use a trigger or job for this? I want that SQL Server checks those dates every day, and if any of it is < DateTime.Now, it must change a column [IsPremium] of that row.
Add the following statement in your Daily running JOB, if you have. (Your question in unclear. As per my understanding I post this)
UPDATE <tablename> SET
IsPremium = 1
WHERE [expires date] < GETDATE()
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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;