sql update multiple columns

Generally, the following SQL statement is used to update the field value:Copy codeThe Code is as follows:UPDATE mytable SET myfield = 'value' WHERE other_field = 'other _ value '; However, what if you want to update multi-row data and record different field values in each row? For example, my blog has three classification directories (free resources, tutorial gui

', $updates, $field, $fields, $where); return $sql;} /** * Convert a two-dimensional array into case-then-batch update condition * @param $data array two-dimensional array * @param $field string Column name * @return String SQL statement */function ParseUpdate ($data, $field) {$sql = '; $keys = Array_keys (curre

Many people know how to use table aliases in select statements, but there may not be so many people who know how to use table aliases in SQL Update statements, the following describes how to use the table alias for this SQL Update statement for your reference. The SQL

SQL Server triggers enable simultaneous addition, deletion, and update of multiple tables Definition: What is a trigger? In SQL Server is a certain operation of a table, triggering certain conditions, thus executing a program. A trigger is a special stored procedure.There are three common triggers: Apply to insert,

Update Table_1 Set score = score + 5 where UID in (select UID from table_2 where sid = 10); In fact, update can also be used to the left join, inner join to the association, may be more efficient execution, the above SQL to replace theJoin in the following ways: The code is as follows Copy Code

I think a lot of people know that in Oracle, stored procedures can be passed in an array (such as int[]), that is, you can pass multiple records to the data to update together. Reduce the number of requests to the database. But what about SQL Server? Bulk INSERT This is a lot of people know, I also know, but unfortunately, I have never used, only to guide the dat

(SqlParameter Pinchexeunit.param) command. Parameters.Add (P); } result+=command. ExecuteNonQuery (); } transaction.commit (); } Catch(Exception ex) {//Attempt to roll back the transaction. Try{transaction. Rollback (); } Catch(Exception ex2) {return Newresultint>() {Success=false, Message = Ex2. Message, StackTrace =EX2. StackTrace}; }

One-to-multiple table Field update SQL statement table T_A www.2cto.com id name1 Zhang weisan 2 LITH table T_ B id name1 zhangs1 zsan1 zs2 lisi2 ls www.2cto.com objective: change the name of the record corresponding to the id in Table T_ B and the id in Table T_A to be consistent with the name in Table T_A. As follows: id name1 Zhang San 1 Zhang San 1 Zhang San 2

How can I write SQL statements to submit multiple update records first:

How can I write the SQL code before submitting multiple update records: lt; script nbsp; typetextjavascript nbsp; srcajax. googleapis. comajaxlibsjquery1.4.4jquery. min. js? 1.1.29 gt; lt; script nbsp; srcjss: how can I write SQL statements when submitting multiple

Background of demand generation:Database built into the library when the dictionary data, but this dictionary data, some are inaccurate, so you need to find some fixed data to replace.Problem Resolution Logic:The general logic is, first of all, the fixed need to replace the string extracted, assigned to the variable.The data replaced with replace is then updated with the UPDATE statement.The following code:DECLARE @pacsIp varchar (30)--Define a tempor

Tags: collection of SQL stored procedure IDsHere is an example to illustrate:I want to add the name of a part of the brand (that is, brand_name) followed by 1,brand_id is the primary key, the SQL statement is easy to implement, but how does the stored procedure write?The following error is spelled://************************************************ALTER PROC [dbo]. [Stored procedure name]@Brand_IDs varchar (

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

Tags: SQL Server duplicateenvironment : Windows Server 2003 sp2,sql Server 2000, software for managing fixed assets.Failure phenomena:To increase the fixed asset information for two Cisco switches at the same time, the serial number is different because the model is identical. So I want to finish one, can directly copy a document to change the inconsistent place on the line. But the front desk can't be real

of slot number to the SQL Server data page has a basic understanding, here to steal a picture of a netizen.The so-called slot number is in the data page, each page stores multiple rows of data, the slot number is used to mark the offset of each row of data, with plain English said is "the location of the address space to store each row of data",Because the total length of each row of data is different (in

basic understanding of the data page of SQL Server. Here we steal a picture of a netizen. The so-called slot number stores multiple rows of data on each page of the data page. It is used to mark the offset of each row of data, to put it bluntly, it is "the starting position of the address space for storing each row of Data", because the total length of each row is different (in the case of a Variable Lengt

function used to compare common CREATE FUNCTION [dbo].[fn_splitstringtotable] ( @s VARCHAR(Max), @split VARCHAR(Ten) ) RETURNS @re TABLE(IdINT IDENTITY(1,1), ValueVARCHAR( -) ) as BEGIN IF @s is NULL RETURN IF @split is NULL RETURN IF(LEN(@split)0) BEGIN INSERT into @re VALUES(@s) RETURN END DECLARE @splitlen INT SET @splitlen=LEN(@split)- 1 while CHARINDEX(@split,@s)> 0 BEGIN INSERT @re V

The implementation method of mysql batch update and batch update of different values of multiple records, mysql multiple Batch update The mysql update statement is simple. to update a f

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