MySQL

1. Start and Exit 1. Enter MySQL: Start MySQL Command Line Client (DOS interface of MySQL) and enter the password for installation. At this time, the prompt is: mysql & gt; 2. exit MySQL: quit or exit 2. database operation 1. create database Command:

Max-allowed-packet max_allowed_packet Mysql 5.1 encounters an excessively large information package problem when importing data using the client, the error code is: 1153-Got a packet bigger than 'max _ allowed_packet 'bytes terminates data import.

I went online for a long time and found the driver or something. I used to use Navicat directly.1. Create a database test in mysql.2. Open the plus sign on the left of the database test, which will display tables, views, functions, and so on.3. On

Mysql float double type 1. float Type float column type default length cannot be found, you must specify the precision, such as num float, insert into table (num) values (0.12); select * from table where num = 0.12, empty set. Num float (0.12),

Mysql character set and verification analysis use case first let's look at an example: there is a user table www.2cto.com User (username VARCHAR (5) character set utf8COLLATE utf8_general_ci); There is a record ('username '); and ('username'); Use

In mysql, the difference and length between int, bigint, smallint, and tinyint are created by creating a table, let's take a look at the differences between int bigint smallint and tinyint in mysql and the length of www.2cto.com 1. CREATE the

1548-Cannot load from mysql. proc. the table is probably updated upted solves The problem when a colleague sends an email saying navicat queries The database and reports The error 1548-Cannot load from mysql. proc. the table is probably successfully

After mysql use db, it is very difficult to solve a mysql instance that you usually use. After using db, it is always very difficult to press Enter. It takes 1 s to return the result. I think there is something strange, I opened the general log and

Mysqldump is a common mysql database tool. We often use it for data and backup, for example, data import and export. This article introduces the code for exporting the most basic database and exporting tables.] # Mysqldump Database Name> Database

This problem occurs during the testing of the developed website background system:Invalid Query: Duplicate entry '000000' for key 1SQL is: INSERT INTO 'kq _ new' ('title', 'autor', 'type', 'content', 'isdel', 'adate', 'range ', 'lang ') values

The tutorial in this article is a simple SQL insert into syntax and an example. Let's take a look at the SQL insert into syntax and then look at the example to illustrate the insert into instance. The tutorial in this article is a simple SQL insert

SQL ALTER TABLE syntax and example tutorial After the alter table statement allows you to change the structure of a TABLE, it is created. Address terms that can be added to a new column. Existing columns may be deleted from the Drop clause table.

SQL union all usage and example tutorial, and SQL union all efficiencyThe UNION operator is used to merge the result sets of two or more SELECT statements. UNION combines multiple tables (or result sets) and returns them as a single result set;Union

Windows 2003 + IIS + PHP + MySQL) Recently, MySQL service process (MySQLd-nt.exe) has a high CPU usage of 100%. This host has about 10 databases, which are called for 10 Websites respectively. According to A Friend test, lead to MySQLd-nt.exe CPU

In SQL, we often want to update data, so we will use the update statement. update can be updated according to your conditions, and can be used in batches or in a single instance. In SQL, we often want to update data so we will use the update

Maybe many of you who use the mysql database do not know the following three methods can fly your mysql. Next I will introduce you to several tuning techniques of the mysql server, for more information, see. MySQL OptimizationThere are three ways to

Next let's answer some questions:◆ Does your database have a foreign key?◆ Do you need transaction support?◆ Do you need full-text indexing?◆ What query mode do you often use?◆ How big is your data?Thinking about the above questions can help you

Speaking of this, try to use mysqli_set_charset (mysqli: set_charset) instead of "set names". Of course, this content is also described in the PHP manual, but it does not explain why.Recently, several friends asked me this question. Why?When there

When logging on to MYSQL, the following message is displayed:ERROR 1045: Access denied for user: 'root @ localhost' (Using password: YES)The password is incorrect. What should I do if I forget the password? Do you need to reinstall it.Linux or UNIX 1

The basic syntax of the SELECT statement in MySQL is:SELECT [STRAIGHT_JOIN] [DISTINCT] [SQL _BIG_RESULT] [HIGH_PRIORITY] [DISTINCT | DISTINCTROW | ALL] select_list [INTO {OUTFILE | DUMPFILE} 'file _ name' export_options] [FROM table_references