You can use them to customize your database schema as per your requirement. In this article, we have learnt how to add one or more columns after a specific column in MySQL. The following simple statement did the trick for me under MySQL 5.5: ALTER TABLE databasename.tablename ADD COLUMN id INT NOT NULL AUTOINCREMENT FIRST, ADD PRIMARY KEY (id) This added a new column id of type integer in front of the existing data ('FIRST' keyword). In both cases, the end result is the same. First product column is added after created_at, then modified_at is added, then quantity is added. ALTER TABLE salesĪDD COLUMN `product` varchar(6) AFTER `created_at` īut please note, in this case, the last ADD COLUMN statement should mention the first column that you want to be added. You can also use a single AFTER statement after the last ADD COLUMN command. In this case, MySQL will first add product column after created_at, modified_at column after created_at, and quantity column after modified_at. ALTER TABLE salesĪDD COLUMN `modified_at` date AFTER `product`,ĪDD COLUMN `quantity` int AFTER `modified_at` Let us say you want to add multiple columns product, modified at, quantity after created_at, then here is how to do it using multiple ADD COLUMN commands, each followed by AFTER clause. mysql> ALTER TABLE salesĪDD COLUMN `product` varchar(6) AFTER `created_at`, The data type specifies what type of data the column can hold. We use the following SQL statement: Notice that the new column, 'DateOfBirth', is of type date and is going to hold a date. Then we need to mention AFTER clause and then the column name after which you want to add the new column. Look at the 'Persons' table: Now we want to add a column named 'DateOfBirth' in the 'Persons' table. sql ALTER TABLE tableName ADD columnName DATE NOT NULL. We need to specify the new column name after ADD COLUMN, followed by its definition. columnName reportdate //Our SQL query that will alter the table and add the new column. ADD COLUMN newdate DATETIME AFTER precedingcol, Thanks. Does anyone know what that syntax looks like Heres what Ive got. In the above command, we use ALTER TABLE command to add column, followed by ADD COLUMN command. I cant find what the syntax looks like for adding a DATETIME column to a mysql table when I want to set the default to - example - 14:30:00. alter table table_nameĪdd column column_name1 column_definition AFTER column_name2 Let us say you want to add another column product after created_at column. mysql> create table sales(id int, created_at date, amount int) Let us say you have the following MySQL table sales(id, created_at, amount). How to Add Column After Another Column in MySQL In this article, we will learn how to add column after another column in MySQL. But sometimes, you may need to add one or more columns after another column in MySQL. Generally, database developers add one or more columns anywhere in a MySQL table without preferences.
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