A function performs some specified work, usually taking parameters as input. In terms of databases these may be specific to SQL or to the database vendor.

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16k views

Granting Execute Permissions on Stored Procedures, Functions and Views

I am using a user which has read permission only. It basically has permission to Connect Execute However, it does not have execute permissions on Functions and Stored Procedures. In part of my ...
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1answer
3k views

MySQL: Why is DATEDIFF and TIMEDIFF/60.0/60.0/24.0 results different?

I have a database with two DATETIME values, and then I generate some new values from them: tdiff = timediff(d1,d2)+0 day1 = truncate(tdiff/60.0/60.0/24.0,0) day2 = datediff(d1,d2)+0 All three of ...
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votes
3answers
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What does NVL stand for?

What does NVL stand for? I'm talking about the Oracle and Informix (perhaps some others too) function used to filter out non NULL values from query results (similar to COALESCE in other databases).
5
votes
1answer
336 views

How to store and query products the price of which depends on a complex set of conditions?

I haven't decided on a database. I have expirience with MySQl and I'm intrigued by MongoDB. Let the products be packages of cable tv providers: { name: "Virgin TV", price: 20 }, { name: ...
10
votes
1answer
796 views

Scalar function used in calculated column, what's the cleanest way to update the function?

I want to update a scalar function in our database. This function is used for several calculated columns in a key table so I get a dependency error if I try to update it. I can explicitly remove the ...
3
votes
1answer
521 views

Why does it take a long time to drop a function based index in Oracle?

I have a function based index that takes 25 minutes to create on a table of 94 Million rows. When I drop the index, it takes 18 minutes. Why does it take so long? I would have thought the drop would ...
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votes
3answers
4k views

What's the difference between functions and stored procedures? [closed]

I heard that the difference between functions and stored procedures in SQL Server is that functions are not stored in the database while stored procedures are. Is that true? If not, what are the ...
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3answers
1k views

Finding five-minute interval prior to current time

I want to find the five minute interval just before the current time. So if the current time is 8:43 I want to return 8:35 and 8:40. Here is the query that I have written and it is working as ...
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vote
0answers
816 views

stored procedure returns ERROR 1305 (42000): FUNCTION does not exist

I have a stored procedure and function as below CREATE PROCEDURE ProcName() begin .... DECLARE curs CURSOR FOR select A.PList, B.nid from persons A inner join articles B on A.aid=B.id; .... ...
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votes
2answers
2k views

Why do I get leading zeros when converting from decimal to char in a db2 query?

I have a column named length defined as: TYPE_NAME: DECIMAL DATA_TYPE: 3 COLUMN_SIZE: 9 BUFFER_LENGTH: 11 DECIMAL_DIGITS: 5 NUM_PREC_RADIX: 10 When I run the following select: select ...