mysql> alter table [table name] modify [column name] VARCHAR(3);

mysql> alter table [table name] drop index [colmn name];

To make a column bigger in MySQL, you can use the ALTER TABLE statement along with the MODIFY COLUMN clause. Here’s an example:

sql

ALTER TABLE your_table_name MODIFY COLUMN your_column_name new_data_type;

Replace your_table_name with the name of your table, your_column_name with the name of the column you want to modify, and new_data_type with the new data type and size you want to assign to the column.

For example, if you want to increase the size of a VARCHAR column named column1 in a table named your_table to 100 characters, you would run:

sql

ALTER TABLE your_table MODIFY COLUMN column1 VARCHAR(100);

To delete the UNIQUE constraint from a column in MySQL, you can also use the ALTER TABLE statement. Here’s an example:

sql

ALTER TABLE your_table DROP INDEX index_name;

Replace your_table with the name of your table and index_name with the name of the unique index you want to remove.

For example, if you have a unique constraint named unique_constraint1 on a column named column2 in a table named your_table, you would run:

sql

ALTER TABLE your_table DROP INDEX unique_constraint1;

Make sure to replace unique_constraint1 with the actual name of your unique constraint.