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When/Why to use Cascading in SQL Server?
...eal key rather than a surrogate key (identity/autoincrement column) across tables.
The canonical example for Cascade Update is when you have a mutable foreign key, like a username that can be changed.
You should not use Cascade Update with keys that are Identity/autoincrement columns.
Cascade Updat...
unresolved reference to object [INFORMATION_SCHEMA].[TABLES]
I've created a UDF that accesses the [INFORMATION_SCHEMA].[TABLES] view:
3 Answers
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How to Publish Web with msbuild?
...Version parameter depend on your version of Visual Studio. Wikipedia has a table of Visual Studio releases and their versions.
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How to create a new database after initally installing oracle database 11g Express Edition?
...O myschema;
Now you can connect via Oracle SQL Developer and create your tables.
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Is floating point math broken?
...754 is anything with an error of less than one unit in the last place. The table of reciprocals of Y (1/Y) is known as the quotient selection table (QST) in the slow division, and the size in bits of the quotient selection table is usually the width of the radix, or a number of bits of the quotient ...
How do I create a unique constraint that also allows nulls?
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This very problem hits ADO.NET DataTables too. So even that I can allow nulls in the backing field using this method, the DataTable won't let me store NULLs in a unique column in the first place. If anyone knows a solution for that, please post it here
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How to count TRUE values in a logical vector
...values.
See for example:
z <- c(TRUE, FALSE, NA)
sum(z) # gives you NA
table(z)["TRUE"] # gives you 1
length(z[z == TRUE]) # f3lix answer, gives you 2 (because NA indexing returns values)
So I think the safest is to use na.rm = TRUE:
sum(z, na.rm = TRUE) # best way to count TRUE values
(whi...
How to write UPDATE SQL with Table alias in SQL Server 2008?
...ment on SQL Server is as follows:
UPDATE Q
SET Q.TITLE = 'TEST'
FROM HOLD_TABLE Q
WHERE Q.ID = 101;
The alias should not be necessary here though.
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Java how to replace 2 or more spaces with single space in string and delete leading and trailing spa
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wait a second @geowar This does replace a single table with a space. I just tried it
– user1870400
Dec 13 '17 at 10:15
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SQL select only rows with max value on a column [duplicate]
I have this table for documents (simplified version here):
27 Answers
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