I\'ve got a very performance sensitive SQL Server DB. I need to make an efficient select on the following problem:
I\'ve followed this question with a full example in case it isn\'t clear what I mean from the question.
Could you guys please review the following query to an Oracle DB and point out what\'s wrong: SELECT t1.name FROM t1, t2 WHERE t1.id = t2.id AND t2.empno IN (1, 2, 3, …, 200)
I have a Postgres DB running 7.4 (Yeah we\'re in the midst of upgrading) I have four separate queries to get the Daily, Monthly, Yearly and Lifetime record counts
I have the following statement to find unambiguous names in my data (~1 Million entries): select Prename, Surname from person p1
SELECT Trade.TradeId, Trade.Type, Trade.Symbol, Trade.TradeDate, SUM(TradeLine.Notional) / 1000 AS Expr1
I have a large table (~10 million records) that contains several keys into other, smaller tables.The keys are unique in each of the smaller tables but not in the large one.I woul开发者_Python百科d lik
I have a Database table where I need to validate if a user has entered in the same or partly the same information.
Have a larg开发者_开发技巧e table that is fast approaching 11 million records. (20 columns in the table).
How costly would SELECT One, Two, Three be com开发者_如何学Cpared to SELECT One, Two, Three, ..... N-Column
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