![]() Now, we will apply the ALTER TABLE ADD COLUMN statement to add a new column at the end of the columns present in the Products table in the database:ĪLTER TABLE Products ADD Cost INT NOT NULL But if these options are not provided in the ALTER ADD COLUMN query then, the new table column will be affixed at the end of the list of columns in the table. There are two options you can either add the table column after the last column existing in the table using AFTER ColumnNameKeyword or, as first column using FIRST ColumnNamekeyword. FIRST | AFTER ColumnName: It determines the position of the new table column to be added.Col_Definition: It includes the Data Type for the new column added, maximum size and also valid CONSTRAINTS for the column.NewColumnName: Mention the name of the new table column to be added.TableName: We will provide the specific table name after the keywords, ALTER TABLE where we want to supplement a new column or columns.Here, the above terms are explained as follows: Let us add a column to the Products table using the succeeding syntax for ALTER TABLE ADD Query.ĪDD NewColumnNameCol_Definition We will use the ALTER TABLE ADD command to proceed towards adding one or more table columns to this demo table just created above. Hadoop, Data Science, Statistics & others Let us explain the working of ALTER COLUMN in MySQL using the syntaxes and examples. Suppose, we will set up a demo table in the database for demonstration, using the following CREATE query statement:ĬREATE TABLE Products (ProductID INT PRIMARY KEY AUTO_INCREMENT, Product_Name VARCHAR (255) NOT NULL,SupplierID INT NOT NULL) ![]() ![]() ![]()
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