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How to store a list in a column of a database table
...hrdad's answer to a related question , I get it that a "proper" database table column doesn't store a list. Rather, you should create another table that effectively holds the elements of said list and then link to it directly or through a junction table. However, the type of list I want to creat...
How can I make SQL case sensitive string comparison on MySQL?
...y I have had luck in using varbinary instead of varchar for a field in ut8 table. HTH
– Andrew T
Jan 5 '15 at 19:54
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MySQL OPTIMIZE all tables?
MySQL has an OPTIMIZE TABLE command which can be used to reclaim unused space in a MySQL install. Is there a way (built-in command or common stored procedure) to run this optimization for every table in the database and/or server install, or is this something you'd have to script up yourself?
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Pass column name in data.table using variable [duplicate]
In following example, I am creating a data table having column name ‘x’ and ‘v’
1 Answer
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How to report an error from a SQL Server user-defined function
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For an inline-table-valued-function where the RETURN is a simple select, this alone doesn't work because nothing is returned - not even null, and in my case I wanted to throw an error when nothing was found. I didn't want to break down th...
Rails :include vs. :joins
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.joins will just joins the tables and brings selected fields in return. if you call associations on joins query result, it will fire database queries again
:includes will eager load the included associations and add them in memory. :includes loads all...
How to turn IDENTITY_INSERT on and off using SQL Server 2008?
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Via SQL as per MSDN
SET IDENTITY_INSERT sometableWithIdentity ON
INSERT INTO sometableWithIdentity
(IdentityColumn, col2, col3, ...)
VALUES
(AnIdentityValue, col2value, col3value, ...)
SET IDENTITY_INSERT sometableWithIdentity OFF
The complete error messa...
Hide all but $(this) via :not in jQuery selector
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$("table.tr").not(this).hide();
As an aside, I think you mean $("table tr") (with a space instead of a dot).
The way you have it, it selects every table which has a class of tr (eg, <table class="tr">), which is probab...
What is the “owning side” in an ORM mapping?
... example of two entities mapped without declaring a owning side:
@Entity
@Table(name="PERSONS")
public class Person {
@OneToMany
private List<IdDocument> idDocuments;
}
@Entity
@Table(name="ID_DOCUMENTS")
public class IdDocument {
@ManyToOne
private Person person;
}
From a...
Does order of where clauses matter in SQL?
Let's say I have a table called PEOPLE having 3 columns ID, LastName, FirstName , none of these columns are indexed.
LastName is more unique, and FirstName is less unique.
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