Mssqlsql efficiently associates with the update batch update of subqueries
Mssql SQL efficiently associates with the update batch update of subqueries
Mssql SQL efficiently associates with the update batch update of subqueries/
Reprinted from:http://blog.csdn.net/amohan/article/details/9980315
Fast and Efficient use: SET sql_safe_updates = 0; don't look at it!
When you use MySQL Workbench to perform a database management update today, a statement that executes an update encounters the following error message:
Error code:1175
You is using Safe update mode and you tr
Copy Code code as follows:
Create Trigger Tgname
On TB
For update
As
If Update (recommend)
Begin
Update TB Set commenddate= (GETDATE ()) from TB inner join inserted on Tb.vlistid=inserted.vlistid
End
Recommend represents the field being updated.
The key is the inserted table
Two special tables are used in trigger statements: Deleted tables and in
Original source http://bijian1013.iteye.com/blog/1895412 the difference between the for update and for update nowait First of all, if only select, Oracle will not add any locks, that is, Oracle to select There is no limit to the data read, although it is possible that another process is modifying the data in the table, and the result of the modification may affect the result of your current SELECT statem
The following articles mainly introduce the actual usage of the MySQLupdate statement. We first use the UPDATE statement of a single table to introduce the actual implementation of the MySQLupdate statement.
The following articles mainly introduce the actual usage of MySQL update statements. We first use a single-Table UPDATE statement to introduce the actual sol
Win10 can not be started without fear! WinRE recovery Environment Easy to repair WIN10 systemWIN10 Technology Preview released to date, has been a full 10 days. After the experience of this period of time, the small partners have encountered some problems, resulting in system errors or even can not start it? It is likely that the first time you think about it is to go into safe mode, use windowsPE, or reload the system to repair the damaged system. however, in Vista since the system, we have a b
Product Automatic connection server-side update ideas, server-side update ideas
Product Automatic Update ideas
1. (user) User initiated raw
2, (System) connection server side, send the current version number
3, (server-side) detection data, for the latest version is returned 1, the reverse is the following processing:
The server-side version is stored in the fol
Original article address: nuget Action Plan-upgrade to 1.1, setup automatic updates, get nuget package Explorer
I have found three small actions for you. Dear readers, they will make your life better. What do you do with me while watching?
First, you must installNuget, A. Net Package Manager, what? You already have it? Which version is 1.1? Is the setting automatically updated?Action 1: automatically checks for extended updates
In tools> options, select environment | Extension Manager in the env
Achieve hot update of iOS images and other resource files (4): a minimal patch update logic, ios resource filesIntroduction
I have previously written a patch update Article. Here we will make a more streamlined implementation to facilitate integration. to make the logic universal, the dependency on AFNetworking and ReativeCocoa will be removed. original article,
Segment tree segment update hdu 1698 Just a Hook, segment update hdu
N metal rods, and q are given. At the beginning, each metal rod has a value of 1. Each operation can replace the metal rod from x to y. The copper is 1 and the silver is 2, the value of gold is 3, and the total value of all metal rods is calculated.
Lazy tags are used to update segments of a
1, there are some graphics card models it will limit the BIOS on the video driver updates. Only need to cancel the limit can be updated video driver. Restart your computer first, and then press DEL to enter the BIOS setup in the reboot. Locate the "Chipset Features Setup" option, set the inside "Assign IRQ to VGA" to "Enable" and save the exit. Of course, this type of graphics card model is generally Matrox graphics card, but if your video card is ATI graphics card, then set the video card to a
Apple is prompted to enter Apple ID account and password when updating software
1. In this case you may be installed using the assistant, we can use the computer to update, the iphone connected to the computer and then use like ITUNES,PP Assistant to update.
2. Then we open the PP assistant click on "can be upgraded application"-"genuine upgrade" can be.
The Apple ID account that was prompted at
Some Win7 users are accustomed to using the system's own updates to update the system, this method is more convenient, but it is easy to occur sometimes update failed, and sometimes not. This causes the system to duplicate the installation of the update, and there will be many failure records in the history list. How can we solve this problem?
Windows7 with
Tags: generate src technology adb date tle TAB update LSEMariaDB 10.3 Resolved the update cannot be queried in the same table as updates to the same table, and supports the updatean UPDATE statement with the same source and destination. See the case directly belowCREATE TABLE T1 (c1 int, c2 int), INSERT into T1 VALUES (10,10), (20,20);
Introduction to update subqueries and update queries
Basic knowledge1. Associated subqueries and non-associated subqueries
In a non-associated subquery, an internal query only executes once and returns its value to an external query. Then, an external query uses the value returned by an internal query in its processing. In associated subqueries, an internal query is executed once for each row of data return
Basic Update Statements
The Oracle UPDATE statement processes one or more rows in a table and sets one or more columns to the values of you specify.
Update All records
UPDATE SET
CREATE TABLE Test ASSELECT object_name, Object_typeFrom All_objs;SELECT DISTINCT object_nameF
Windows System Update is an updated patch package that Microsoft is not regularly pushing to the user, the main solution exists in the system of related risk vulnerabilities, usually our system will automatically download and install the patch package, but some users in the update WIN8 system patches, there are "This update does not apply to your computer" proble
Suppose we have two tables, a table that holds product information for the product table, which contains price list prices; Another table is the Productprice table, and we want to update the Price field in the Productprice table to 80% of the price field in the prices table.
In MySQL we have several means to do this, one is update table1 t1, table2 ts ... The way:
Copy Code code as follows:
Label:Operation of the database, often error operation, yesterday after the update operation found that the update is wrong, only to find ways to recover data, now tidy up First step: Query the time to perform the update operation Select from V$sqlarea R ORDER by r.first_load_time Desc; Execute the above SQL statement in the Sql_text field to find the
How to disable auto update in WIN10 and disable auto update in WIN10
Sometimes the computer automatically updates and switches on and off the machine will be very troublesome, and it will take a long time to wait. Even more, the system may crash and re-build the system after the update. Now we will teach you how to disable the
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