How to use commands to build tables in navicat

Create a table in Navicat through commands: Connect to the database and open a command line window. Use the CREATE TABLE syntax to specify table names, column names, and data types. Optional: Add constraints (such as NOT NULL) and default values ​​(such as DEFAULT). Different data types are available, such as INT, VARCHAR, and DATE.

Use commands to build tables in Navicat

1. Overview

Navicat is a database management tool that provides command-line interface support, and can perform various operations in the database through commands, including creating tables.

2. Syntax

The command syntax for creating a table is:

 <code>CREATE TABLE table_name ( column_name1 data_type [NOT NULL] [DEFAULT default_value], column_name2 data_type [NOT NULL] [DEFAULT default_value], ... );</code>

3. Steps

Use the Navicat command line to create tables, you need to connect to the database first, and then execute the command.

1. Connect to the database: Start Navicat, select the type of database you want to connect to, enter the connection information and connect.
2. Open a command line window: In Navicat, click Tools > Command Line to open a command line window.
3. Create a table: In the command line window, enter the following command, where table_name is replaced by the name of the table, column_name and data_type are replaced by the name and data type of the column.

 <code>CREATE TABLE table_name ( column_name1 data_type [NOT NULL] [DEFAULT default_value], column_name2 data_type [NOT NULL] [DEFAULT default_value], ... );</code>

For example, to create a table named customers that contains columns of id (integer), name (string), and email (string), use the following command:

 <code>CREATE TABLE customers ( id INT NOT NULL AUTO_INCREMENT, name VARCHAR(255) NOT NULL, email VARCHAR(255) );</code>

4. Pay attention

• NOT NULL constraint means that the column cannot be NULL (null value).
• The DEFAULT clause specifies the default value of the column, used when no value is provided when a new record is inserted.
• Data types can use one of the following types: INT , VARCHAR , DATE , TIME , DATETIME , FLOAT , BOOL , etc.

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