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MySQL foreign key constraints, cascade delete
...iven your table design. Perhaps the best thing to do is to define a stored procedure that will delete a category the way you want, and then call that procedure whenever you want to delete a category.
CREATE PROCEDURE `DeleteCategory` (IN category_ID INT)
LANGUAGE SQL
NOT DETERMINISTIC
MODIFIES SQL ...
Proper MIME media type for PDF files
...048 - Multipurpose Internet Mail Extensions (MIME) Part Four: Registration Procedures. According to RFC 3778, which is cited by the IANA as the definition for "application/pdf",
The application/pdf media type was first registered in 1993 by Paul Lindner for use by the gopher protocol; the regist...
How do I perform an IF…THEN in an SQL SELECT?
...act-SQL statements, statement blocks, user-defined functions, and
stored procedures.
If your needs can not be satisfied by these limitations (for example, a need to return differently shaped result sets dependent on some condition) then SQL Server does also have a procedural IF keyword.
IF @Inc...
How do you check if a certain index exists in a table?
...r taking an hour due to missing index.
Correction: Alter query process or Procedure to check for index and create it if missing... Same code is placed at the end of the query and procedure to remove index since it is not needed but quarterly. Showing Only drop syntax here
-- drop the index
begin
...
Unit Testing bash scripts
...om a discussion group:
it's possible to import (include,
whatever) a procedure (function,
whatever it's named) from an external
file. That's the key to writing a
testing script: you break up your
script into independent procedures
that can then be imported into both
your running sc...
Java code To convert byte to Hexadecimal
... I have a collection of byte strings in an array. But what i have to do is analyse each byte seperately.. So, I dont want to work on the whole array, but individual byte string at a time, that is one component of that array.. The confusion arised because of the word "array". Now in the below code " ...
How to read a text file into a list or an array with Python
...ining the alphabetic characters 3 by row (a,b,c, d,e,f, etc) and apply the procedure described above what you get is a list like this: ['a', 'b', 'c\nd', 'e', ... ] (note the item 'c\nd'). I'd like to add that, the above problem notwistanding, this procedure collapses data from individual rows in a...
CHECK constraint in MySQL is not working
...R ;
Prior to MySQL 5.5 you had to cause an error, e.g. call a undefined procedure.
In both cases this causes an implicit transaction rollback.
MySQL does not allow the ROLLBACK statement itself within procedures and triggers.
If you don't want to rollback the transaction ( INSERT / UPDATE should ...
Creating an index on a table variable
...empdb is that the names can then clash. Not just theoretically with other procedures but often quite easily with other instances of the procedure itself which would try to put the same index on its copy of the #temp table.
To avoid name clashes, something like this usually works:
declare @cmd var...
What is a simple command line program or script to backup SQL server databases?
...u'll also want to read the documentation on BACKUP and RESTORE and general procedures.
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