Detailed introduction to data table operations

View table structure For a successfully created data table, you can use the SHOW COLUMNS statement or DESCRIBE statement to view the table structure of the specified data table. These two statements are introduced below. 1.SHOW COLUMNS statement The syntax format of the SHOW COLUMNS statement is as follows: SHOW [FULL]COLUMNS FROM data table name [FROM database name]; or SHOW [FULL]COLUMNS FROM data table name.database name; 2. DESCRIBE statement The syntax of DESCRIBE statement The format is as follows: DESCRIBE data table name; among them, DESCRIBE can be abbreviated as DESC. When viewing the table structure, you can also list only the information of a certain column. The syntax format is as follows: DESC data table name column name; rename the table using the RENAME TABLE statement. The syntax is as follows: RENAME TABLE data table name 1 to data table name 2; for example: change the admin table name to user, the format is as follows ：rename table admin t

1. MySQL View, delete and rename data tables (MYSQL data table operation tutorial 3)

Introduction: View table structure For a successfully created data table, you can use the SHOW COLUMNS statement or DESCRIBE statement to view the table structure of the specified data table. These two statements are introduced below. 1.SHOW COLUMNS statement The syntax format of the SHOW COLUMNS statement is as follows: SHOW [FULL]COLUMNS FROM data table name [FRO

2. MySQL modifies the data table (MYSQL data table operation Tutorial 2)

Introduction: Modify the table structure Use the ALTER TABLE statement to modify the table structure. Modifying the table structure means adding or deleting fields, modifying field names or field types, setting or canceling primary keys and foreign keys, setting or canceling indexes, and modifying table comments, etc. The syntax format is as follows: ALTER[IGNORE] TABLE data table name alter_spec[,alter_spec]...;

3. MySQL creates a data table (MYSQL data table operation tutorial 1)

Introduction: Before operating the MySQL data table, you need to select the database first before you can operate in the specified database. Perform operations on the data table, such as creating a data table, modifying the table structure, renaming the data table, or deleting the data table, etc. Otherwise, the data table cannot be operated. Okay, let’s introduce the specific operations on the data table. Creating a data table Creating a data table is very similar to creating a database. The syntax format is:

4. Detailed explanation of MySQL data table operations

# Introduction: This article introduces what commands need to be used to operate the data tables in the database.

5. ThinkPHP’s data table operation_PHP tutorial

Introduction: ThinkPHP’s data table operation. Read data Read $m=new Model('User'); $m=M('User'); select $m->select();//Get all data and return it as an array find $m ->find($id);//Get a single piece of data getField(field name

6. ThinkPHP data table operation

Introduction: ThinkPHP data table operation. Reading data Read $m=new Model('User'); $m=M('User'); select $m->select(); //Get all data and return it as an array find $m->find($id); //Get a single piece of data getField(field name

7. sql database and data table operation statements

#Introduction: sql and data table operation statements This includes database creation, deletion, modification, backup, as well as creating new tables, deleting tables, adding table indexes, creating views, etc.; 1. Instructions: Create a database create database database-name 2. Description: Delete the database drop database dbname 3. Description: Back up sql server --- Create a device for backing up data use master exec sp_a

8. Data model class for secondary development of phpcms v9

Introduction: In the secondary development of phpcms v9, we often need to modify the module The data table can be used to query, add, modify and delete data. All these operations are inseparable from the data model class model.class.php, which plays an interactive role between developers and data tables. model.class.php encapsulates many data table operation methods. Basically, commonly used mysql operation statements can be found in it, but it is different from the original mysql statement. Like other PHP content management systems, PHPCMS also For the original mysq

9. Detailed explanation of data table operations in MySQLIntroduction: Using MySQL, you can currently use three basic databases Choose between table formats. When you create a table, you tell MySQL which table type it should use for the table. MySQL will always

10. MySQL commonly used data table operations SQL

Introduction: As a program developer, you often have to Import and export some data. Today I will share some SQL that I use to import and export data: All test statement data below use tablename 1. Export the table structure show create table tablename; 2. Export the data of a table to an external file select * into outfile '/tmp/data.txt' f

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