Sorry for the ignorant question, but what kind of applications wouldn\'t require an ACID compliant database server?I have a SQL Server background where 开发者_如何转开发ACID has always \"been there\",
The possibility of this happening seems extremely unlikely to me because of the problems it could cause, but I figured I\'d ask the question anyway...
No worries! It looks more complex than it actually is! Just get down to the drinks! TLDR-version: How to efficiently query and update entities having relationships to other entities?
Say I have a table X with 100 records in it and that running a select * from X takes 100 seconds. How long should I expect the query select top 10 * from X to ta开发者_运维百科ke?
I have a stored procedure that goes something like this (pseudo code) storedprocedure param1, param2, param3, param4
Can we get a list of basic optimization techniques going (anything from modeling to querying, creating indexes, views to query optimization). It would be nice to have a list of these, one technique pe
I want to retrieve all records from one table when there are no matches in the second table. So 开发者_如何转开发it is kind of the opposite of an inner join.You need a LEFT JOIN WHERE IS NULL query (
You often see database fields set to have a magnitude of 255 characters, what is the traditional / historic reason why? I assume it\'s something to do with paging / memory limits, and performance but
I am working on an online survey. Most questions have a scale of 1-5 for an answer. If we need to add a question to the survey, I use a simple web form, which does an INSERT into the appropriate table
I often see people who write SQL like this: SELECT * from TableA LEFT OUTER JOIN TableB ON (ID1=I2) I myself write simply:
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