about mysql

Comparison with MSSQL to learn about MYSQL (1) -- the basic syntax is mainly used to learn the basic syntax of MYSQL and will be updated in succession. Syntax differences Here I mainly talk about different syntaxes. 1. default

Comparison with MSSQL to learn about MYSQL (2) -- display width: Let's first look at the width range of integer data types Create a table Create table tb_emp (id BIGINT (1 )) The data type of the id field is BIGINT (1). Note the following

For help, I spent one afternoon on the Mysql code. Please check if the code has any problems and the database can be correctly connected without tests. that is, the while loop condition $ row & nbsp; = & nbsp; mysql_fetch_array ($ result) returns

PHPcodefunctionwriteLeft () {$ retArrayarray (); [color # FF0000] $ SQL & quot; selectid, name, strrfromjh_lanmu & quot ;; [color] $ resultmysql_query ($ s ask a PHP question about MYSQL operations PHP code function writeLeft(){ $retArray

Similarity to Big Data lookup-some ideas about Mysql Article matching and how to improve query speed, mysql matching The idea of relevance matching in the article is "compressing" the prediction database, that is, extracting the feature words or

About mysql character encoding settings Inserting Data in mysql always displays ??? Garbled text. Many people on the Internet said that the trial was not correct. After a large amount of query information, they wrote the Solution Below. Different

About MySQL data save with UTF8 encoding saved, some data search not to My Web page is UTF8 encoded, so I added mysql_query ("Set names ' Utf-8 '") when I saved the data; MySQL organized into a utf8_general_ci While I was searching for data, $so

Ask a question about MySQL If a short string is stored in the database: Ab Bc Cd So the word on my hand is a long string, such as ABCD, so what should SQL do to match that character with the short Word records in the library? Do you want to use

About MySQL's default Excuse me CREATE DATABASE paging CHARACTER SET UTF8; And CREATE DATABASE Paging DEFAULT CHARACTER SET UTF8; Can create a table, what is the difference? Default is optional, what is the specific purpose? Syntax: CREATE

Asking for help, about MySQL. This code has been engaged for an afternoon, ask the great God to see if the code has a problem Tested to properly connect the database is the while loop condition $row = mysql_fetch_array ($result) This sentence

About MySQL and GD library loading issues We installed the MySQL and PHP through the connection between what, and why we do not install the GD library and only need to open the GD library can use it,,, why a need to install a do not need to install,,

Sunday Disturb everybody, really embarrassed, but really is anxious ah ... The question about MySQL PHP Code $query =mysql_query ("select * from user where id={$_post[' id ']}"); while ($result =mysql_fetch_array ($query)) {

Questions about MySQL Batch replacement The table name is: sdb_daq_comment Fields are: Content There are some tags inside the content. How to write SQL for batch replacement of MySQL tags? ------Solution-------------------- Update sdb_daq_comment

When connecting to the MySQL database server, sometimes the client will report 2003 error code, and prompt: Unable to connect to the server, but the server can ping, the possible reasons are as follows:1. The network does not pass.Check to be able

MySQL variables are divided into three categories.1, global variables (built-in variables): MySQL database built-in variables (all connections play a role) A. See All global variables: show variables; Select @@ 变量 name; Set variable

The time to restore MySQL data to customer service today. Data that would have been tested well. But to the customer there is no work. Old Error! 1 INSERT INTO ka_tan4 set num=‘716641385999‘, username=‘admin‘,adddate=‘1353078270‘

Set a password for the root user of MySQL1. The newly installed MySQL does not have a password set2. Set the password*************************************************************************************************************** *********************

MySQL has many engines,MyISAM, InnoDB, MERGE, MEMORY (HEAP), BDB (BerkeleyDB), EXAMPLE, Federated... Wait a minuteMore commonly, InnoDB and MyISAM.. MyISAM does not support transactions, INNODB support, MyISAM does not have atomicity, and if you

Company Order System Daily order volume is huge, there are many table data super million. The company SQL optimization this piece does very badly, can say is did not do, therefore causes the query to be very slow.Excerpt a sentence from a feature

Because of some default settings in the project, and for various reasons, MySQL database needs to be developed in a non-strict mode (the most recent version of MySQL is turned on in strict mode by default).Under Linux MySQL service, the following