affected rows

Pdo usage learning notes. 1. basic concepts 1. PDO: the abbreviation of PHPDataObject. The PDO extension class library defines a lightweight and consistent interface for PHP. It provides a data access abstraction layer, regardless of the basic

For the three APIs used by php to connect to the mysql database, refer to the self-php Manual. This article does not make much sense. it is just for your convenience to access the Internet. 1. MySQL extension of PHP2. mysqli extension of PHP3.

This article mainly introduces the ZendFramework database operation skills, and summarizes and analyzes the common functions, common operations, and precautions of ZendFramework for database operations based on the instance form, for more

Explanation of myslq_replace statement bitsCN.com REPLACE runs like INSERT. There is only one exception. assume that an old record in the table and a record used for PRIMARY If the new record of a KEY or UNIQUE index has the same value, the old

: This article mainly introduces common commands for PHP database operations. if you are interested in the PHP Tutorial, refer to them. Connect to databaseDetermine whether the connection is successful or not. $ link = mysql_connect ('localhost', '

Create proc P_TEST @ Name VARCHAR (20 ),@ Rowcount INT OUTPUTASBEGINSELECT * FROM T_Customer where name = @ NameSET @ Rowcount = @ ROWCOUNTENDGOBytes ------------------------------------------------------------------------------------------ The

Package Com.examp.use_sqlite.dao;import Java.util.arraylist;import Java.util.list;import Android.content.contentvalues;import Android.content.context;import Android.database.cursor;import Android.database.sqlite.sqlitedatabase;import

Package Com.examp.use_sqlite.dao;import Java.util.arraylist;import Java.util.list;import Android.content.contentvalues;import Android.content.context;import Android.database.cursor;import Android.database.sqlite.sqlitedatabase;import

Scenario:There is a business database that uses MySQL 5.5 and writes a large amount of data every day. It is easy to delete data from multiple tables before the specified period from time to time, write a few WHILE loops. Although MySQL also has

Encapsulate your own DB Class (PHP) and db Class php. Encapsulate your own DB Class (PHP). encapsulate db Class php to encapsulate a DB class for special database operations. any operations on the database in the future will be implemented by DB

There are basically three types of commonly used objects: connection, command, and dataset. A connection represents a physical connection to certain data storage areas (such as SQL Server or XML files. Command indicates the command

Reply to database from log -- create Test Database   Create Database DB   Go     -- Back up the database   Backup database dB to disk = 'C: \ dB. Bak' with format   Go     -- Create a test table   Create Table dB. DBO.

UseTempdb Go --Create test table Create TableTB(IDChar(8)) --Create a unique index used to automatically filter duplicate values Create Unique IndexIx_tbOnTB(ID) WithIgnore_dup_key Go --Test data insertion Processing Time,Record Start Time

Add a salary to an employee. when half of the employees do not reach 6000 yuan, add 100 to all employees and print the salary. Code Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/--> -- Add a

A problem encountered at work is the need for SQL Recursive query So I went to csdn to ask, the efficiency was really high, and I didn't ask the question before. Problem description: I have a table structure as follows: Id upperid 1 2 3 2 4 1 5. I

Normal mode, with $pdo->exec ($SQL); Can return the number of affected rows; How do I know how to affect the number of rows if I insert delete data into a preprocessed object?$stmt = $pdo->prepare ($SQL);$stmt->execute (); Reply content:

How to connect to the SAE database .. the last time I split the framework, I needed to connect to the SAE Database. I really didn't set up my own database. crazy sweat. sae gave this sae. class. php class, how can I use this swelling ?...............

Mysql ignores primary key conflicts and prevents repeated insertion of bitsCN.com Several ways for mysql to ignore primary key conflicts and avoid repeated inserts Solution 1: Use the ignore keyword Solution 2: Use replace Solution 3: ON DUPLICATE

This article describes in detail how to prevent repeated mysql insert records. if you are interested, you can refer to many methods to prevent repeated mysql insert records. ignore is commonly used, replace, on duplicate key update, of course we can

Inner join on, full outer join, left join on, right jion on1. Inner join on combination of internal join tables2. full outer is connected to the same combination of the two tables. Table A has data that table B does not have (it is displayed as null)