Greetings, I have this table, on a postgreSQL 8.4 server : CREATE TABLE tags ( tagidbigserialPRIMARY KEY,
This is a fairly simple question, but it\'s one I can\'t find a firm answer on. I have a parent table in PostgreSQL, and then several child tables which have been defined.A trigger has been establish
I want to generate unique file 开发者_如何转开发paths in Objective-C. I looked at NSTemporaryDirectory() but the closest I could get was to this and this. But in the second one they create such a file
I already have 80 million records inserted into a table, but need to ensure a few columns are jointly unique. However, the columns already contain non-unique data, so ALTER TABLE doesn\'t work.
Suppose you need to discover all possible permutations of \'n\' distinct characters, say \'a\', \'b\', \'c\'.Can you suggest 开发者_StackOverflow社区an algorithm I can use to get this done?Generally s
Hey, I was trying to delete an item form a list (without using set): list1 = [] for i in range(2,101): for j in range(2,101):
I have an array comprising n rows and 4 colums. Each of the four entries开发者_JS百科 on the row is an integer, i.e.,
Is it possible for php(or javascript in the worst case) to create a unique id for a user that is not cookie or ip dependant. I have seen on myminicity.com that on eac开发者_开发问答h city the count on
I want to unique duplicate values in a dict. It looks like this: d = { \"a\":1, \"b\":2, \"c\":2, \"d\":3,
When I save the information from a registration form I have some validation rules on the username and email fields (I\'ve pasted the rules below). Validation is called automatically with the saveAll()
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