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SQL - many-to-many table primary key
...is guaranteed unique (assuming your col1 and col2 values in the referenced tables are unique) and a separate index on (col2,col1) will catch those cases where the opposite order would execute faster. The surrogate is a waste of space.
You won't need indexes on the individual columns since the table...
Convert generic List/Enumerable to DataTable?
...te using FastMember from NuGet:
IEnumerable<SomeType> data = ...
DataTable table = new DataTable();
using(var reader = ObjectReader.Create(data)) {
table.Load(reader);
}
This uses FastMember's meta-programming API for maximum performance. If you want to restrict it to particular members (...
MySQL: Can't create table (errno: 150)
I am trying to import a .sql file and its failing on creating tables.
34 Answers
34
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Tools for making latex tables in R [closed]
On general request, a community wiki on producing latex tables in R. In this post I'll give an overview of the most commonly used packages and blogs with code for producing latex tables from less straight-forward objects. Please feel free to add any I missed, and/or give tips, hints and little trick...
In which case do you use the JPA @JoinTable annotation?
In which case do you use the JPA @JoinTable annotation?
5 Answers
5
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Rounded table corners CSS only
...Q/3/
Edit: Here's a relatively clean implementation of your sketch:
table {
border-collapse:separate;
border:solid black 1px;
border-radius:6px;
-moz-border-radius:6px;
}
td, th {
border-left:solid black 1px;
border-top:solid black 1px;
}
th {
backgr...
Copy table without copying data
copies the table foo and duplicates it as a new table called bar .
4 Answers
4
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jquery - fastest way to remove all rows from a very large table
I thought this might be a fast way to remove the contents of a very large table (3000 rows):
8 Answers
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Is it possible to roll back CREATE TABLE and ALTER TABLE statements in major SQL databases?
...working on a program that issues DDL. I would like to know whether CREATE TABLE and similar DDL can be rolled back in
5 A...
What is the difference between a stored procedure and a view?
...
A view represents a virtual table. You can join multiple tables in a view and use the view to present the data as if the data were coming from a single table.
A stored procedure uses parameters to do a function... whether it is updating and inserting ...