大约有 44,000 项符合查询结果(耗时:0.0293秒) [XML]
LAST_INSERT_ID() MySQL
...
what if 2 INSERTS happend at the same time or one before another?
– FosAvance
Mar 28 '13 at 16:45
32
...
MySQL ON DUPLICATE KEY - last insert id?
...bottom of the page they explain how you can make LAST_INSERT_ID meaningful for updates by passing an expression to that MySQL function.
From the MySQL documentation example:
If a table contains an AUTO_INCREMENT column and INSERT ... UPDATE inserts a row, the LAST_INSERT_ID() function returns t...
HTML input - name vs. id [duplicate]
...
In HTML4.01:
Name Attribute
Valid only on <a>, <form>, <iframe>, <img>, <map>, <input>, <select>, <textarea>
Name does not have to be unique, and can be used to group elements together such as radio buttons & checkboxes
Can not be...
How can I list all foreign keys referencing a given table in SQL Server?
...eferenced table in a SQL Server database. How can I get a list of all the foreign key constraints I will need to remove in order to drop the table?
...
How to create an object for a Django model with a many to many field?
...= Bar.objects.get(pk=2)
foo = Foo()
foo.save()
foo.bars = [bar1, bar2]
Unfortunately, that creates one additional SELECT:
SELECT "app_bar"."id", "app_bar"."name" FROM "app_bar" WHERE "app_bar"."id" = 1
SELECT "app_bar"."id", "app_bar"."name" FROM "app_bar" WHERE "app_bar"."id" = 2
INSERT INTO "ap...
Rails: Using greater than/less than with a where statement
...
it automatically escapes the 200 (were it possible for the user to enter the value, it avoids the possibility of SQL injection attacks)
– user1051849
Nov 4 '14 at 11:21
...
How to get next/previous record in MySQL?
...
you're right, i forgot the FROM clause. thanks for pointing it out. :)
– longneck
Sep 20 '09 at 15:33
2
...
COUNT(*) vs. COUNT(1) vs. COUNT(pk): which is better? [duplicate]
...ableHere) or COUNT(tableHere.*), use that.
In short, don't use COUNT(1) for anything. It's a one-trick pony, which rarely does what you want, and in those rare cases is equivalent to count(*)
Use count(*) for counting
Use * for all your queries that need to count everything, even for joins, use...
RESTful on Play! framework
... almost the same way Codemwncis' solution works but uses the Accept header for content negotiation. First the routes file:
GET /user/{id} Application.user
POST /user/ Application.createUser
PUT /user/{id} Application.updateUser
DELETE /user/{id} ...
mongodb group values by multiple fields
For example, I have these documents:
3 Answers
3
...
