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C # Use SqlDataAdapter. Update to Update a database

The data obtained from the database is displayed on the DataGridView. Then change the data. The method for changing data is included in the button event. The data display method is needless to say. The SqlCommandBuilder class and SqlDataAdapter. Update () method are used for updating. The SqlCommandBuilder object is used to generate SQL statements used to update databases. You do not have to create these st

How to update the graphics driver, quickly update the graphics drive method

Every time you install a computer, you need to install a graphics driver, but many beginners do not know how to find and install the driver, in fact, we can use to drive life to install updates, and then take a look at it! What happens if you don't update or even install a video driver? Graphics drivers if not installed, Windows system color display will be very poor and bad. Because Win7 integrates a large number of drivers, this extreme phenomenon

"INSERT on DUPLICATE KEY Update" update some fields

Prior to the wormhole (we developed a large volume data transmission tool, similar to Apache Sqoop, Taobao datax) MySQL writer supports insert into and replace into two ways into the MySQL table. Now there is a need to support the update part of the field operations, such as a calculated pile of merchant ID (shopid) and corresponding PageView total (viewtotal), need to update to a multiple-field shop table

"INSERT on DUPLICATE KEY Update" update some fields

Prior to the wormhole (we developed a large volume data transmission tool, similar to Apache Sqoop, Taobao datax) MySQL writer supports insert into and replace into two ways into the MySQL table. Now there is a need to support the update part of the field operations, such as a calculated pile of merchant ID (shopid) and corresponding PageView total (viewtotal), need to update to a multiple-field shop table

Update MySQL with ADO "Unable to locate row for update. Some values may have been changed after the last read "problem resolved

This strange error was encountered today in Delphi using ADO to update data with MySQL via ODBC: Unable to locate rows for updates. Some values may have changed since the last read.Think of the solution, and then online search. Some say because there is no primary key, but I have this table, some say there is a default value, I checked, all fields are not the default value, and some say that the first insert and then edit caused, I this is pure edit,

Eloquent batch update of multiple records (update when present, insert when not present)

Eloquent batch update of multiple records (update when present, insert when not present) It is not a batch assignment of multiple fields to a record. Similar BULK INSERT: DB::table('users')->insert(array( array('email' => 'aaa@example.com', 'name' => 'zhangsan', 'age'=> 0), array('email' => 'bbb@example.com', 'name' => 'wangwu', 'age'=> 0), ...)); There are no similar statements: DB::table('users')->

Comparison between four methods for batch ORACLE update and four methods for oracle update

Comparison between four methods for batch ORACLE update and four methods for oracle update Software Environment Windows 2000 + ORACLE9i Hardware environment CPU 1.8G + RAM 512 M Now we have two tables: T1 -- large table 10000 T1_FK_ID T2 -- small table 5000 T2_PK_ID T1 is associated with the primary key ID of T2. The simulation data is as follows: -- T2 contains 5000 pieces of data Create table T2 As Selec

Hibernate data update-session. Update/session. saveorupdate

Keyword: hibernate update saveorupdateHibernate data update-session. Update/session. saveorupdate Session. Update: 1. First, search for the key of the object to be updated in the internal cache of the current session. If it is found, the current object is considered to be in the persistent state and return. From th

When the update value is the same as the original value, does SQL Server actually update or ignore it?

Consider the following: When the update value is the same as the original value, does SQL Server actually update or ignore it? For example: UpdateTbnameSetName='ABC' --The original value of name is ABC.WhereID=1 Another example is: UpdateTbnameSetName='ABC' --The original value of name is ABC.WhereName='ABC' Next we will test: --Microsoft SQL Server 2008 R2 (SP1)-10.50.2500.0 (x64) JUN 17 2011 00

Google PR value update update frequency back to three months once

Today, May 3, in Wuyi Labor Day after the second day Google updated the site's PR (Pagerank) value, Google this update PR value is this year's second update. This year's first Google PR update is in this year's Lantern Festival (February 6), from February to May, we can see that this is Google restored not three months to upd

Update association Other tables Bulk update data

When you update a table in bulk, you need to rely on a different table when you update a column of a table, which can be a where conditional clause, or the value of the field that you want to update depends on another tableThere are usually two ways of doing1. Using Stored Procedures2. Loop through the program codeHere is a more efficient, concise approach, batch

Always update failed solution when KB2965699 file update under Windows 8

If it is a Win8 system, update the application store to the latest version and upgrade the system to Win8.1. Operation Steps: WIN8 cannot update automatically, update failed? Download the Install Update Repair tool. For win8/win8.1 users, Microsoft offers an official solution that eliminates the need for a separat

Baidu snapshot of the site update your site snapshot update it?

Baidu has recently been in the fluctuation, in the evening of June 14, a relatively large update, a lot of webmasters are reflected in the sharp drop, the chain soared, ranked not too big fluctuations. Daily records of the site's snapshots, included and outside the chain, the basic is 8:30 to work when the query once. This week when the site was queried, a strange phenomenon was found: snapshots are updated in the afternoon. Take the results of today'

Win8.1 update System appears "This update does not apply to your computer" reason analysis

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

Mysql Update multiple table update SQL statement Summary _mysql

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:

Data recovery After an update is performed by Oracle update

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 does one disable automatic updates on a computer? How does one disable automatic update and update WIN10 automatically in win10?

How does one disable automatic updates on a computer? How does one disable automatic update and update WIN10 automatically in win10? When we use the computer again, we are particularly worried about automatic system updates. So what can we do to prevent automatic updates? See the following! Method 1 Click the START key and select the setting key To Go To The setting page! Open the settings page an

Mssqlsql efficiently associates with the update batch update of subqueries

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/

Error code:1175 You is using Safe update mode and you tried to update a table without a WHERE that

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

SQL UPDATE triggers can get information about the rows being update _mssql

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

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