how to update multiple rows in sql

Tags: style blog io ar os using SP java forThe technical points for executing multiple SQL at a time are as follows: DatabaseMetaData interface is to describe the overall comprehensive information about the database, because DatabaseMetaData is an interface, so there is no construction method, so you cannot use new to create the DatabaseMetaData object, However, it can be created by connection's Ge

join [DBO]. ZHONGHE_TAB as z on f. Student ID = Z. Student ID8 order by f. Student ID ASC9 GO10. View the created view:3.2.1. Modify the information of multiple data tables through the view ???? :1 UPDATE [SQL-LI]. [dbo]. [SHITU_FFENSHU_XINXI]2 SET [name] = 'aaaaa', -- this field is in the [information table]3 [average score] = 111 -- this field is in [s

1: An SQL statement can be added to the two tables at the same time, update, delete operations? 2: Can a SQL statement have only SELECT statements for multiple table operations at the same time? 3: What if multiple Add/update/del

table: 3.1.1. Create a view associated with three tables: USE [SQL-LI] gocreate view SHITU_FFENSHU_XINXI (name, student ID, average score, total score, class, date of birth) asselect top 800 X. name, F. student ID, Z. average score, Z. total score, X. class, X. date of birth FROM [DBO]. XINXIN_TAB as x inner join [DBO]. FENSHU_TAB as f on x. student ID = F. student id inner join [DBO]. ZHONGHE_TAB as z on f. student ID = Z. student id order by f. st

Tags: upd dex tran from CEE SQL queries against recordsin this example, the begin Tran and with (holdlock) hints are used to observe the locks of SQL Server in the SELECT statement. The transaction is turned on to ensure that the lock is also observed by a very short query, because HOLDLOCK releases the lock after the transaction ends. UPDATE statement: The l

This tutorial for you to introduce the SQL of the multiple table query, let's look at the specific examples. Create a new two sheet: Table 1:student screenshot as follows: Table 2:course screenshot as follows: (This is just a table to demonstrate the connection of SQL statements, of course, in the actual development we do not build tables, the actual deve

Tags: RAC CTI database sel _id relative multiple columns need ORMSQL Update Select combined statement and applicationOctober 1, 2013 MK database 19 read 157,639 times QL Update SELECT statement The most common update syntax is: 1 2 table_name VALUE If my

#-*-Encoding: utf8 -*-'''@ Author: crazyant.netRead the (id, age) data of Table B, and update Table A in sequence;'''From common. DBUtil import DBDbUtil = DB ('127. 0.0.1 ', 127, 'root', '', 'test ')Rs = dbUtil. query ("SELECT id, age FROM table_ B ")For row in rs:(Idv, age) = rowPrint (idv, age)Update_ SQL = "update table_a set age = '% s' where id =

(int i = 0; i {for (int j = 0; J {Ds. Tables[0]. ROWS[J]. BeginEdit ();Ds. Tables[0]. rows[j]["Scanflag"] = true;Ds. Tables[0]. rows[j]["CardId"] = List[i]. CardId;Ds. Tables[0]. ROWS[J]. EndEdit ();if (i = = list. COUNT–1)Break}Da. Update (ds. Tables[0]);}Ds. Clear ();Ds.

follow three rules: Order by cannot be specified in the view definition, unless the definition contains the Top or For Xml description; All columns must have column names; All these column names must be unique; The Order by statement is not allowed when top or for xml is not described in the view chart. This is because the view is considered a table and the table is a logical entity, its rows are unordered. All columns in the view must ha

Create a new two sheet: Table 1:student screenshot as follows: Table 2:course screenshot as follows: (This is just a table to demonstrate the connection of SQL statements, of course, in the actual development we do not build tables, the actual development of the two tables will have their own different primary key.) ） One, outer connection Outer joins can be divided into: Left join, right connection, complete outer connection. 1, left join

Insert/update/delete operation insert (insert) 1. Simple Form Note: A new object is added to the corresponding set using the insertonsubmit method and submitted to the database using submitchanges. NorthwindDataContext db = new NorthwindDataContext();var newCustomer = new Customer{ CustomerID = "MCSFT", CompanyName = "Microsoft", ContactName = "John Doe", ContactTitle = "Sales Manager", Address = "1 Microsoft Way", City = "Redmond",

ORACLE basic SQL statements-add and update data functions, oraclesql 1. Add data /* Add data */Insert into STU values ('stu0004', 'zhao yi', 18, 1, "kc0004 ");Insert into STU (STU_ID, STU_NAME, STU_AGE, STU_SET) values ('stu0013', 'Storage 11', 19,1 ); Note: If you do not specify the field to which the data is added, all data must be listed. If fields are listed, all fields whose constraints are not empty m

immediately when the locked object is not needed, equal to the serializable transaction isolation levelNOLOCK statement execution does not emit a shared lock, allowing dirty reads, equal to the READ UNCOMMITTED transaction isolation LEVELPaglock with multiple page locks where a table lock is usedREADPAST let SQL Server skip any locking lines, perform transactions, apply to READ UNCOMMITTED transaction isol

1. What is the cursor? Oracle uses two types of cursor: explicit cursor and implicit cursor. No matter how many records are returned by the statement, PL/SQL implicitly declares a cursor for each SQL command, such as UPDATE, DELETE, and INSERT. To manage SQL statement processing, you must implicitly define a cursor fo

Tags: date update detail round GROUP by SET statement where requiredEveryone knows UPDATE statement: Updatetable name Set field = Value . It seems very simple. But today I have a problem: I need to update a score field called Po_special_task_line table, which is calculated from another Score detail table (special_assessment_score_detail), The association between

, But the use of insert-I is far from simple and efficient. Here is an example of how to use insert one to make it clear. Insert the Tot_amount First: Indicates that when the condition is met, it jumps to the next record and no longer judges the other when condition. All: Regardless of whether the previous when condition is satisfied, subsequent conditions are judged, and multiple tables may be inserted at once. Sample complete code: Sq

A method of SQL Update multi-table joint updating You can modify the field values of one table and the other table associations based on the values of one table's fields, like an associated queryUpdate table one set table one. Column name = Table two. column name from table one, table two where table one. id = table Two. ID This article summarizes the use of the UPDAT