how to update multiple rows in sql

Discover how to update multiple rows in sql, include the articles, news, trends, analysis and practical advice about how to update multiple rows in sql on alibabacloud.com

Batch update the rows bound to the gridview Web Server Control (edit all rows at the same time)

text field, enter"Update". Click the event button () to displayButtonControls. In the "click" field, Type"Updatebutton_click"And press Enter.Visual Web DeveloperButtonClick Event of the control to create an event handler. The code is similar to the following code example.protected void UpdateButton_Click(object sender, EventArgs e){} Replace the Generated Process with the following code.protected void UpdateButton_Click(object sender, EventArgs e)

Oracle Sql%rowcount Returns the number of rows affected, SQL Server @ @RowCount returns the number of affected rows

Label:In SQL Server, the number of affected rows returned is: If @ @RowCount In Oracle, the number of affected rows returned is: If sql%rowcount Cases: Sql server: Create procedureproc_test@Stat int=0, @MsgId varchar( -)="', as BEGIN UpdateT_mtSetSta

The implementation method of mysql batch update and batch update of different values of multiple records, mysql multiple

it can be implemented with tips. The Code is as follows: UPDATE mytable SET myfield = CASE id WHEN 1 THEN 'value' WHEN 2 THEN 'value' WHEN 3 THEN 'value' END WHERE id IN (1, 2, 3) Here we use the case when tip to implement batch update.For example: The Code is as follows: UPDATE categories SET display_order = CASE id WHEN 1 THEN 3 WHEN 2 THEN 4 WHEN 3 THEN 5 END WHERE id IN (1, 2, 3) This

SQL Server Execution plan uses statistics to estimate the data rows (why the composite index column order affects the estimate of the data rows for the execution plan)

), perform a fully sampled (with FULLSCAN) statistics update to see the estimated number of rows again. This time the estimate is: Same as 2894.49, is consistent with the above algorithm Summarize: The text simply demonstrates the algorithms and principles that the execution plan uses to estimate the statistical information, and the interference factors that may be affected when calculating the estimated

SQL Server execution plan leverages statistics to estimate the data rows and changes in the estimated policies in SQL Server 2014

PremiseWhen this article discusses only SQL Server queries,For non-composite statistics, where the statistics for each field contain only the data distribution of theHow to estimate the number of rows based on statistical information when combining queries with multiple fields.The algorithm principle of estimating the number of data

Split a column with multiple IDs into multiple rows

See an uncommon problem ~ Then find an idea in inner SQL server2008. If the following table structure is used, how can we split multiple rows and correspond to employee numbers? First, create a test table. Create Table Department (ID int identity (500) primary key, departmentname varchar (50) null, members nvarchar () null) Create Table employee (ID int identi

Split a column with multiple IDs into multiple rows

Tags: blog, http OS, AR, Data, SP Div, 2014 Art If the following table structure is used, how can we split multiple rows and correspond to employee numbers? First, create a test table. Create Table Department (ID int identity (500) primary key, departmentname varchar (50) null, members nvarchar () null) Create Table employee (ID int identity () primary key, name nvarchar (50) null) insert into Depa

T-SQL rows merged into columns and columns split rows

Tags: and tar entity begin font charindex results from table The source of this article: http://www.cnblogs.com/wy123/p/6910468.html I feel the recent SQL has not written less, suddenly a little rusty, for use is not too frequent some operations, time is easy to live. One column of multiple rows merged into one column CREATE TABLETestcolumnmergeandsplit (Idint

Php database operation class (to add, delete, modify, and query tables, retrieve rows, and query multiple data Records)

Php database operation class (to add, delete, modify, and query tables, retrieve rows, and query multiple data Records) The php database operation class allows you to add, delete, modify, and query tables, obtain the number of rows, query multiple data records, query left connections, and create a data table s

PHP Database Operation class (Implementation of table additions and deletions, fetching rows, querying multiple data, etc.)

PHP database Operation class, to realize the table additions and deletions, to get the number of rows, query multiple data records, left connection query, create data table structure. Feature-rich, convenient to move the value, the need for friends, you can refer to the next.PHP Database class complete code with example below.1. Code Links = mysql_connect (Db_host, Db_user, db_pwd); if (DEBUG) {mysql_s

Database update multiple record different values, update multiple fields at the same time

Label:DemandThe following two tables student (student table), score (Test score table)Statistics are required: After 2015-03-10, the scores of the test scores of the sex age=1 were divided into the average.Requirement: Use a SQL Statistics score table to update the results to the Score_sum and Score_avg fields of the student table.ResultsRealize:If we only need to updat

T-SQL rows merged into columns and columns split rows

Tags: null union PNG IMA entity begin Col Font spanOriginal: T-SQL rows merged into columns and columns split rows The source of this article: http://www.cnblogs.com/wy123/p/6910468.html I feel the recent SQL has not written less, suddenly a little rusty, for use is not too frequent some operations, time is easy to l

Mybatis executes Update and returns a negative number of rows. mybatisupdate

Mybatis executes Update and returns a negative number of rows. mybatisupdate Obtain the number of update rows of mybatis. A negative number is always returned. Later, I found the reason on the official website because of defaultExecutorType. defaultExecutorType has three executors SIMPLE, REUSE, and BATCH. Among them,

MyBatis execution Update Returns a negative number of rows

Gets the number of update rows for the MyBatis and always returns negative numbers. Later on the official network to find the reason, is due to Defaultexecutortype, Defaultexecutortype has three actuators simple, reuse and batch. Where batch can cache SQL for bulk update operations to improve performance, there is a fl

Add, update, and delete rows

The sqlitedatabase class exposes specific methods, such as insert, delete, and update. These methods encapsulate the SQL statements required to execute these actions. Even so, the execsql method allows you to execute any valid SQL statements on the database table, and these actions are what you want to manually execute. At any time, if you modify the value of th

occal [Problem Resolution]ora-01427: Single-line subquery returns multiple rows

I am asked a question, the situation is as follows:He is going to update Divide_stat's New_amount field with the New_amount field based on Divide_act_channel_day.Conditions associated with two tables: Day=log_time,channel=channel--sql as follows:Update Divide_statSet divide_stat.new_amount= (select Divide_act_channel_day.new_amount from Divide_act_channel_daywhereDivide_stat.day=divide_act_channel_day.log_t

Add, update, and delete rows in Android SQLite

The sqlitedatabase class exposes specific methods, such as insert, delete, and update. These methods encapsulate the SQL statements required to execute these actions. Even so, the execsql method allows you to execute any valid SQL statements on the database table, and these actions are what you want to manually execute. At any time, if you modify the value of the

MySQL batch update and batch update multiple records of different values implementation method

? MySQL does not provide a straightforward way to implement batch updates, but it can be accomplished with a little bit of skill. code as follows: UPDATE mytable SET myfield = case ID When 1 Then ' value ' When 2 Then ' value ' When 3 Then ' value ' END WHERE ID in (All-in-a- This is a small trick to implement a batch update. As an example: code as follows:

Implementation of different values for mysql batch update and batch update of multiple records _ MySQL

2 THEN 'value'WHEN 3 THEN 'value'ENDWHERE id IN (1, 2, 3) Here we use the case when tip to implement batch update.For example: UPDATE categoriesSET display_order = CASE idWHEN 1 THEN 3WHEN 2 THEN 4WHEN 3 THEN 5ENDWHERE id IN (1, 2, 3) This SQL statement indicates that the display_order field is updated. if id = 1, the value of display_order is 3. if id = 2, the value of display_order is 4, if id = 3, the v

MySQL batch update and batch update multiple records of different values implementation method

Then ' value 'When 2 Then ' value 'When 3 Then ' value 'ENDWHERE ID in (All-in-a- This is a small trick to implement a batch update.As an example: The code is as follows:UPDATE CategoriesSET Display_order = case IDWhen 1 then 3When 2 then 4When 3 then 5ENDWHERE ID in (All-in-a- This SQL means, update the Display_order field, if id=1 the value of Display_order is 3, if id=2 Display_order value is 4, if id=3

Total Pages: 15 1 .... 4 5 6 7 8 .... 15 Go to: Go

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.