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How to add on delete cascade constraints
In PostgreSQL 8 is it possible to add ON DELETE CASCADES to the both foreign keys in the following table without dropping the latter d scores Table
How to alter a column and change the default value
I got the following error while trying to alter a columns data type and setting a new default value ALTER TABLE foobardata ALTER COLUMN col VARCHAR255 NOT NULL
How to assert two list contain the same elements in Python duplicate
This question already has answers here How to efficiently compare two unordered lists not sets 13 answers Closed 8 years ago When writing test cases I often
How to automatically generate N distinct colors
I wrote the two methods below to automatically select N distinct colors It works by defining a piecewise linear function on the RGB cube The benefit of this is
How to calculate percentage with a SQL statement
I have a SQL Server table that contains users amp their grades For simplicitys sake lets just say there are 2 columns name amp grade So a typical row would be
How to convert a PNG image to a SVG closed
Closed This question needs to be more focused It is not currently accepting answers Closed 8 years ago Locked This question and its answers are locked because
How to create a private class method
How come this approach of creating a private class method works class Person def selfgetname personsname end class ltlt self private def personsname Sam end
How to escape double quotes in a title attribute
I am trying to use a string that contains double quotes in the title attribute of an anchor So far I tried these lta href titleSome textgtSome textltagt lt The
How to get all columns names for all the tables in MySQL
Is there a fast way of getting all column names from all tables in MySQL without having to list all the
