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How to do an update + join in PostgreSQL?
... coming from mysql it's unintuitive that the same join used for select won't also update just by adding a set phrase :( still - the syntax for this is probably easier for a newcomer to sql to master.
– WEBjuju
Jul 16 at 19:47
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Copying files from Docker container to host
... a handy way to get at your latest container if you're simply using docker for a temp Linux environment: docker ps -alq.
– Josh Habdas
Jun 3 '15 at 15:29
40
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Laravel Migration Change to Make a Column Nullable
...s, so you'll need use another technique such as writing a raw SQL command. For example:
// getting Laravel App Instance
$app = app();
// getting laravel main version
$laravelVer = explode('.',$app::VERSION);
switch ($laravelVer[0]) {
// Laravel 4
case('4'):
DB::statement('ALTER ...
Delete duplicate records in SQL Server?
...varchar, uniqueidentifier, or datetime columns, but not with bit columns
For 2008 R2 and earlier,
MIN can be used with numeric, char, varchar, or datetime columns, but not with bit columns (and it also doesn't work with GUID's)
For 2008R2 you'll need to cast the GUID to a type supported by ...
SQL “select where not in subquery” returns no results
...y the same.
When it is nullable, NOT IN is different, since IN (and, therefore, NOT IN) return NULL when a value does not match anything in a list containing a NULL.
This may be confusing but may become more obvious if we recall the alternate syntax for this:
common_id = ANY
(
SELECT common_id
F...
How can foreign key constraints be temporarily disabled using T-SQL?
Are disabling and enabling foreign key constraints supported in SQL Server? Or is my only option to drop and then re-create the constraints?
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How to map a composite key with JPA and Hibernate?
In this code, how to generate a Java class for the composite key (how to composite key in hibernate):
8 Answers
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How do I find a stored procedure containing ?
I need to search a SQL server 2008 for stored procedures containing where maybe
the name of a database field or variable name.
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In which case do you use the JPA @JoinTable annotation?
... and each project can have many tasks.
You can design the database schema for this scenario in two ways.
The first solution is to create a table named Project and another table named Task and add a foreign key column to the task table named project_id:
Project Task
------- ----
id ...
What is the purpose of Android's tag in XML layouts?
...that are simply used to wrap other views and serve no purpose themselves.
For example, if you were to <include/> a layout from another file without using merge, the two files might look something like this:
layout1.xml:
<FrameLayout>
<include layout="@layout/layout2"/>
</F...