postgresqlHow do I use the PostgreSQL VARCHAR data type?
The PostgreSQL VARCHAR data type is used to store character strings of variable length. It is similar to CHAR except that it stores strings of variable length up to a maximum of n characters, where n is the specified length of the column.
For example, to create a VARCHAR column with a maximum length of 10 characters:
CREATE TABLE products (
product_name VARCHAR(10)
);The parts of this code are:
CREATE TABLE: the SQL command used to create a new tableproducts: the name of the new tableproduct_name: the name of the columnVARCHAR(10): the data type and maximum length of the column
When inserting data into the product_name column, the value must not exceed 10 characters.
For more information, please refer to the PostgreSQL documentation.
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