how to update multiple rows in sql

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Execute an SQL query and UPDATE multiple rows of records

When you execute an SQL query and UPDATE multiple rows of records, we usually use the following SQL statement to UPDATE the field value: 1 UPDATE mytable SET myfield = 'value' WHERE oth

Execute an SQL query and UPDATE multiple rows of records _ MySQL

Execute an SQL query and UPDATE multiple rows to record bitsCN.com Execute an SQL query and UPDATE multiple rows of records Generally, the

SQL does not repeatedly search for data and concatenates a column of multiple rows into one row. SQL multiple rows

SQL does not repeatedly search for data and concatenates a column of multiple rows into one row. SQL multiple rows See the following table: Table Name: Test ID RowID Col1 Col2 1 1 A A 2

SQL in SAS (6) Creating tables, presenting tables, inserting rows, deleting rows, restricting conditions (constriants), handling input errors (undo policies), update tables, changing columns

when '2' Then 1.10 when '3' Then 1.15 Else 1.08End; quit;8: Change the columns in the tableTo add, drop (delete), or modify columns in a table, use the ALTER table St Atement. /* add column */ proc SQL; alter table work .payrollmaster4 add Bonus num format= comma10. 2 , level char (3 /* Delete Column */Proc SQL; Alter Table Work . Payrollmaster4 Drop Bonus,lev

Update updates multiple rows of data (Oracle)

a.slid=b.fi_inst)Set Blzt=ft_lstate;(3) Merge Update method (faster when associating fields with non-primary keys)Grammar:MERGE into table_name alias 1USING (Table|view|sub_query) alias 2On (Join condition)When matched thenUPDATESET Col1=col_val1,Col2=col_val2When isn't matched thenINSERT (column_list) VALUES (column_values);Scenario: Select data in Alias2, each with the ALIAS1 on (join condition) comparison, if matched,

Update updates multiple rows of data (Oracle)

) Merge Update method (faster when associating fields with non-primary keys)Grammar: MERGE intoTABLE_NAME Alias1USING (Table|View|Sub_query) Alias2 on(Joincondition) whenMatched Then UPDATE SETCol1=Col_val1, col2=Col_val2 when notMatched Then INSERT(column_list)VALUES(column_values); Scenario: Select data in Alias2, each with the ALIAS1 on (join condition) comparison, if matched,

The key column information is insufficient or incorrect. Update affects multiple rows.

The program that raised the edit record tonight has tried several times and the results are incorrect. Let's take a look and find that the program stops running after a certain statement. This time I have experience. I wrote a statement on error goto in the process. In the Error Processing Section, stop it and then press the following text in the prompt window to get the following results: ? Error The key column information is insufficient or incorrect. Up

Cleverly uses jquery Clone to add multiple rows of data and update the implementation code to the database

Web front-End code:IdTitleSmallclassnameAuthorUpdateTimeCS Page Code:Using System;Using System.Collections.Generic;Using System.Linq;Using System.Web;Using System.Web.UI;Using System.Web.UI.WebControls;public partial class BatchAdd:System.Web.UI.Page{protected void Page_Load (object sender, EventArgs e){if (!string. IsNullOrEmpty (request["Hidnum")){int num = Convert.ToInt32 (request["Hidnum"]);String ID, title, smallclassname, author, updatetime;int rs = 0;if (num > 0){for (int i = 0; I {id = r

Oracle update multiple rows

To update multiple rows: There are many steps, but the efficiency is relatively high:1. Create Table temporary table value (select a. ID, A. Name, B. Name,... from Table1 A, Table2 B where a. ID = B. ID)2. delete records in Table 1. Do not drop3. insert into Table1 select the field you need from the temporary table. Select * From tb_ai03 Create Table tb_ai

Multiple rows and columns in SQL multi-row and multiple column tips

Label:---restore content starts---[This afternoon to accept an emergency small task, is a set of record statistics, the chess game player's two records in a row of the display, into the database after the first thought is the row to the column, but at the beginning felt wrong, and later wrote half really wrong, later on the Internet query for half a day more than a row of rows and more columns, Found to write algorithms and write functions, see the re

MySQL row variable column (multiple rows become one row/multiple rows merged into one row/multiple rows merged into multiple columns/merged rows)

Tags: english sep chinese img Parallel src segmentation Math Group BYDatabase structure And I want to make the same person's different grades into this person. displayed on different columns of this line, this time divided into 2 shows: The first shows----"Multiple rows to one column" (the merged data is on the same column): SQL is as follows: The second show

SQL statements that SQL Server and Oracle query results from multiple rows of records (datasets) and stitch together into a single string (the table data is turned into stitched text)

Usage scenarios:For example, you need to query all student numbers with scores greater than 95, separated by commas into a string, from the Student score table.To prepare the test data:CREATE TABLE score (ID int,score int)INSERT into score values (1,90)INSERT into score values (2,96)INSERT into score values (3,99)It is now necessary to query the result string "2,,3" with a single statement.The SQL Server statements are as follows:Select substring ((SE

[Original] [SQL Server] trigger to obtain information about insert, delete, and update rows

Example of a trigger codes: Code of the insert, delete, and update trigger: Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->-- DBO. trgroups. SQL If exists ( Select * From sysobjects where Name = 'trgroups' and type = 'tr ') Begin Drop trigger trgroups If not exists ( Select * From sysobjects where Name = 'trgroups' and type = 'tr ') Print 'drop trgroups s

SQL Server row to column, column change. Turn multiple rows into a column

(8000) Select @sql =isnull (@sql + ' union All ', ') + ' select name, [Course]= ' +quotename (name, ' "') + ', [score] = ' +quotename (name) + ' fro M TB ' from syscolumns WHERE name!= ' name ' and id=object_id (' TB ')--table name TB, not including other columns named name ORDER by Colid exec ( @sql + ' ORDER by name ') go 3. Using

MySQL SQL gets the last bar inserted id,update affects the number of rows

Label:1. Get the last bar to insert dataLAST_INSERT_ID ();2. Gets the number of update impact rows.Row_count ();mysql> UPDATE T , SET address = ' beijing111 ' , WHERE id = 1 , and NAME = ' Yubowei '; query OK, 1 row affected (0.30 sec) Rows matched:1 changed:1 warnings:0 mysql> C14/>mysql> SELECT Row_count (); +-------------+ | Row

Use functions and cursors to convert Multiple SQL rows into one column.

Sometimes in some systems, we need to use SQL statements to display data in one-to-multiple Relational Tables in the form of a row of each record. This article uses functions and cursors to implement this function. The example table is described as follows: A user table and document table Now you want to implement the following functions to query the synthesis of each user and the corresponding document na

Oracle pure SQL to merge multiple rows

To Merge multiple rows into one project, you must merge multiple rows into one project. The table structure is as follows: Name null type -------------------------------------- N_sec_code not null char (6) C_researcher_code not null varchar2 (20) This table stores the ing data between "stock" and "researcher". Gener

SQL Server concatenates multiple rows in a column into one row

Document directory Example Stuff: For xml path References Example Yesterday I encountered an SQL Server problem: I need to write a stored procedure to process data in several tables. The problem is that I want to splice multiple rows in one column of a table into one row, for example, a table has two columns of data: Category Name A

ORACLE pure SQL to merge multiple rows

To Merge multiple rows into one project, you must merge multiple rows into one project. The table structure is as follows: NAME Null Type ----------------------- ----- N_SEC_CODE not null char (6) C_RESEARCHER_CODE not null VARCHAR2 (20) This table stores the ing data between "stock" and "researcher, generally, for the

A row value that is updated or deleted by SQL server-either cannot make the row a unique row, or it changes multiple rows

Problems that occur when you update a table that does not have a primary key set:Cause of the problem:Most of this is due to the absence of a primary key (PK) that causes several identical data to exist in the same tableWhen the DBMS is stored, only one piece of data is stored, because the DBMS is optimized to reduce data redundancy. So deleting or updating a duplicate data is reachingWorkaround:It is recommended to set the primary key to check for th

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