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What is the most ridiculous pessimization you've seen? [closed]
...'s "too big".
Create an archive table for retired records, but continue to UNION it with the production table.
Duplicate entire databases by (division/customer/product/etc.)
Resist adding columns to an index because it makes it too big.
Create lots of summary tables because recalculating from raw da...
How to allocate aligned memory only using the standard library?
...better idea, please say so...
[Added:
The 'standard' trick is to create a union of 'likely to be maximally aligned types' to determine the requisite alignment. The maximally aligned types are likely to be (in C99) 'long long', 'long double', 'void *', or 'void (*)(void)'; if you include <stdint...
INSERT with SELECT
...ust for information.
INSERT INTO `TableName`(`col-1`,`col-2`)
select 1,2 union all
select 1,2 union all
select 1,2 ;
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How to report an error from a SQL Server user-defined function
...rom foo where ID = @aID
--error checking code is embedded within this union
--when the ID exists, this second selection is empty due to where clause at end
--when ID doesn't exist, invalid cast with case statement conditionally causes an error
--case statement is very hack-y, but th...
Correct format specifier to print pointer or address?
...e representation and alignment requirements as each other. All pointers to union types shall have the same representation and alignment requirements as each other. Pointers to other types need not have the same representation or alignment requirements.
39) The same representation and alignment ...
CSS “and” and “or”
...e expression, it becomes just ".registration_form_right input" because the union of the two selectors includes all inputs.
– geofflee
May 9 '10 at 9:41
...
'IF' in 'SELECT' statement - choose output value based on column values
...
SELECT id, amount
FROM report
WHERE type='P'
UNION
SELECT id, (amount * -1) AS amount
FROM report
WHERE type = 'N'
ORDER BY id;
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What makes a SQL statement sargable?
...) OR (FullName IS NULL)) be SELECT... FROM ... WHERE FullName = 'Ed Jones' UNION SELECT...FROM...WHERE FullName IS NULL? I was once told by an optimisation guy that using OR in the where clause can unsarg queries..?
– High Plains Grifter
Nov 9 '15 at 9:30
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How do I change db schema to dbo
...t answer...
I added an exec to have this code self-execute, and I added a union at the top so that I could change the schema of both tables AND stored procedures:
DECLARE cursore CURSOR FOR
select specific_schema as 'schema', specific_name AS 'name'
FROM INFORMATION_SCHEMA.routines
WHERE specif...
Why should we typedef a struct so often in C?
...ep C Secrets". The gist is: You WANT to know that something is a struct or union, not HIDE it.
– Jens
Mar 14 '12 at 10:31
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