SQL: Adding a 'bigint NOT NULL' Column After Existing Column

The phrase 'AFTER' is typically used in SQL syntax to specify the position of a new column being added to a table. In this case, 'bigint NOT NULL AFTER' would indicate that a new column of data type 'bigint' (a large integer) is being added to the table, and it should be placed immediately after another column in the table (whose name would typically be specified after the 'AFTER' keyword). The 'NOT NULL' constraint specifies that the new column must always have a value (i.e. it cannot be left blank or null).