SQL create table

Last update on November 14 2023 12:20:03 (UTC/GMT +8 hours)

Create Table

Tables are a basic unit of organization and storage of data in SQL. Each table has a name such as an author, book_mast, purchase or orders. A table is similar to a file in a non-database system.

Tables are organized into rows and columns. Each row represents a record, and each column can be thought of as representing a component of that record.

Syntax:

CREATE TABLE <table_name>(
column1    data_type[(size)],
column2    data_type[(size)],
...);

Parameters:

Name	Description
table_name	Name of the table where data is stored.
column1,column2	Name of the columns of a table.
data_type	Char, varchar, integer, decimal, date and more.
size	Maximum length of the column of a table.

SQL create table basic statement

The following will describe, how a simple table can be created.

Example:

The following example creates a table. Here is the field name and data types:

Field Name	Data Type	Size	Decimal Places	NULL
agent_code	char	6		No
agent_name	char	40		No
working_area	char	35		No
commission	decimal	10	2	No
phone_no	char	15		Yes

the following SQL statement can be used:

SQL Code:

CREATE TABLE mytest(
agent_code char(6),
agent_name char(40),
working_area char(35),
commission decimal(10,2),
phone_no char(15) NULL);

To see the structure of the created table:

SQL Code:

DESCRIBE mytest;

Output:

 Name                         Null?    Type
 --------------------------- -------- ------
 AGENT_CODE                           CHAR(6)
 AGENT_NAME                           CHAR(40)
 WORKING_AREA                         CHAR(35)
 COMMISSION                           NUMBER(10,2)
 PHONE_NO                             CHAR(15)

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