MySQL INDEX can be said as a data organization in a database table that helps to progress the speed of the several operations taking place in MySQL and helps to optimize the database. We implement INDEX in MySQL to create indexes using one or multiple columns in a table database to have ...
We use the “CHANGE” command and the “ALTER” command to RENAME an existing column. We can change the table names with the command “RENAME”. The MySQL Rename command is used to rename the existing table or an existing column. We can use “Alter” to rename the table, but renaming ...
To use alter in MySQL query, as you need to fulfill the unique requirements to call the functionality of the alter command, you cannot use it as mentioned above. You need to enclose the altered word with backticks (`), present on your keyboard just above the Tab button.` For example: ...
Recently I was working with a customer wherein our focus was to carry out a performance audit of their multiple MySQL database nodes. We started looking into the stats of the performance schema. While working, the customer raised two interesting questions: how can he make complete use of the...
MySQL Alter Table statement is used to add, modify, drop or delete column in a table you can also use MySQL Alter Table statement to rename the table. In this article I will show you how to add column in a table. ADD COLUMN IN TABLE ...
To update a view object, you use the ALTER VIEW statement followed by the name of the existing view object and the updated SELECT statement. Here, you update the population_stats view object to return the country field in addition to previously selected fields.mysql> CREATE OR REPLACE VIEW po...
You can use this approach, for instance, to retrieve all customers' records from a specific zip code if their address information is stored in a single column. To test this, addaddressandzipcolumns to thecustomerstable. mysql> ALTER TABLE customers ADD address VARCHAR(255) AFTER email , ADD...
To close the MySQL port on all interfaces we use: iptables -A INPUT -p tcp --dport mysql -j DROP and to open the MySQL port again after the maintenance window: iptables -D INPUT -p tcp --dport mysql -j DROP For those without root access, you can change max_connection to 1 or ...
Note that error 135 (no more room in record file) and error 136 (no more room in index file) are not errors that can be fixed by a simple repair. In this case, you must use ALTER TABLE to increase the MAX_ROWS and AVG_ROW_LENGTH table option values: ...
I have created a stored procedure,but i am unable to make any changes on it,How to alter the procedure? Ex: I tried this alter PROCEDURE circle_area (IN r double, OUT a double) BEGIN select a = r * r * pi(); END; Navigate:Previous Message•Next Message ...