SQL

copy column data to another column sql with creating slugs

## Add New Column then UPDATE Old Table Data to New table with Slug type

## Syntax
ALTER TABLE `tblname` ADD `column_slug` VARCHAR(255) NOT NULL AFTER `column_name`;
UPDATE `tblname` SET `column_slug` = replace(lower(column_name), ' ', '-');

## Example
ALTER TABLE `product` ADD `product_slug` VARCHAR(255) NOT NULL AFTER `productname`;
UPDATE `product` SET `product_slug` = replace(lower(productname), ' ', '-');