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CREATING TABLE IN MYSQL HOW TO
CREATING TABLE IN MYSQL CODE

The PRIMARY KEY is placed first in the create table statement

PRIMARY KEY: It’s a unique index and must be defined as NOT NULL.

Once columns are defined, you can create primary key and foreign keys using the following keywords If you do not specify the value of the column in the insert statement, the query inserts the value specified in the DEFAULT constraint DEFAULT: Default values of the column.

If the condition fails, then the insert statement fails CHECK: Before inserting data in the table, it evaluates the condition specified in the CHECK constraint.NOT NULL: Ensures that the value of the column must not be null.You can use any of the following table constraints. MySQL has the following three main categories of the data type.īelow is the list of the numeric data type. It represents the data type of the column. You must specify the column name in the following format: The column name must be separated by the comma (,). The list of the columns must be followed by its data type and table constraint. If you do not specify the database name, then it returns the following error. This command assumes that the database name specified in the create table command does exist. to create a table in a specific database. It will be necessary to make this correction in every EA project file.The Create table command has the following aspects. SQL Server 2012), this should not affect models for other databases. Since the templates appear to be specific to the Language (e.g.

CREATING TABLE IN MYSQL CODE

Modify the code starting about line 10, as shown below. Select the “DDL Column Definition” template. Sort results by clicking the Name column header. Select the required database type from the Language drop down if available. Select the “DDL Data Type” value from the template drop down if available. Solution: It is necessary to open the “DDL Template Editor” tab, to change the scripts used to generate DDL statements.ĮA14: Use Code \ Schema \ DDL \ Edit the DB Schema (DDL) Templates.ĮA15: In the Find Command bar above the ribbon, type “DDL”, and chose Template this opens the “DDL Template Editor” tab. Enterprise Architect is generating “datetime2” however.Īll generated DDL scripts would therefore need to be corrected before use. It is therefore necessary to generate DDL statements for SQL Server that specify “datetime2(0)” when the user specifies a length of 0. The following script gives the results shown below. (The number in “datetime2(#)” specifies precision, which is 0 to 7 digits, with an accuracy of 100ns. In Microsoft SQL Server, the datatypes datetime2(0) and datetime2 are not the same. Problem: In the column properties, when user sets the data type to datetime2 and a length of 0, EA is generating a create-table DDL script that gives the datatype of “datetime2”, not “datetime2(0)”.

CREATING TABLE IN MYSQL HOW TO

Here is the documentation that shows how to fix my issue you will need to do something similar. I have a similar problem, with EA creating datetime2(0) datatypes incorrectly in SQL Server (MSS). You need to edit the script used to create the DDL commands.