6/23/2023 0 Comments Mysql create table from csv![]() ![]() The start_date column has a default value of the current date. Because these columns do not have the NOT NULL constraint, they can store NULL. The start_date and due_date are DATE columns.In other words, you have to provide a non-NULL value when you insert or update this column. The NOT NULL constraint indicates that the column does not accept NULL. It means that you cannot insert a string whose length is greater than 255 into this column. The title column is a variable character string column whose maximum length is 255.If you use the INSERT statement to insert a new row into the table without specifying a value for the task_id column, MySQL will automatically generate a sequential integer for the task_id starting from 1. The task_id is an auto-increment column.The tasks table has the following columns: ) ENGINE= INNODB Code language: SQL (Structured Query Language) ( sql ) The following statement creates a new table named tasks: CREATE TABLE IF NOT EXISTS tasks (Ĭreated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP Let’s take some examples of creating new tables. ![]() Each table has a maximum one AUTO_INCREMENT column.Īfter the column list, you can define table constraints such as UNIQUE, CHECK, PRIMARY KEY and FOREIGN KEY.įor example, if you want to set a column or a group of columns as the primary key, you use the following syntax: PRIMARY KEY (col1,col2.) Code language: SQL (Structured Query Language) ( sql ) MySQL CREATE TABLE statement examples
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