SQL lookup and reference table definitions - Stack Overflow
Jan 12, 2012 · Reference and Lookup tables can mean different things for different sources, and I am not aware of a strict definition to differentiate the two. For me personally I normally use a …
Access the "previous row" value in a SELECT statement
I need to calculate the difference of a column between two lines of a table. Is there any way I can do this directly in SQL? I'm using Microsoft SQL Server 2008. I'm looking for something like …
How to select data of a table from another database in SQL Server?
Using Microsoft SQL Server Management Studio you can create Linked Server. First make connection to current (local) server, then go to Server Objects > Linked Servers > context …
reference - ANSI SQL Manual - Stack Overflow
Aug 16, 2013 · The main problem with an ANSI SQL reference manual is that you can't find a DB which implements it. And when it does, then you'll find that ANSI SQL can't solve some of the …
sql - Reference a created column in the same select statement
Jul 10, 2020 · You can only reference a calculated column in the order by clause. For any other use either use a sub-query or repeat the logic. For any other use either use a sub-query or …
sql - Reference alias (calculated in SELECT) in WHERE clause
Jun 25, 2012 · In this simple example at least, SQL Server is smart enough to only perform the calculation once, even though you've referenced it twice. Go ahead and compare the plans; …
sql - How do I create a cross reference table/query for my data ...
What I'd like to do is be able to create a cross reference table (or procedure if it is efficient enough) so that when I submit a query for a card, I can find all the ruling records that directly …
sql - Referring to a Column Alias in a WHERE Clause - Stack Overflow
A CTE is just prettier syntax for a sub-query, so the performance would be similar to that. In my experience, the performance difference has not been something that has concerned me for …
Excel: Use a cell value as a parameter for a SQL query
Aug 24, 2015 · The SQL is somewhat like the syntax of MS SQL. SELECT * FROM [table$] WHERE *; It is important that the table name is ended with a $ sign and the whole thing is put …
sql - What is difference between foreign key and reference key?
Dec 22, 2011 · Note the word "reference" in the prior sentence is a verb, so we may say we have a referencing foreign key value and a referenced key value. Although it is the key values, …