mysql how to create index
Updating a table with indexes takes more time than updating a table without. The index is useful to speed up the execution of a SQL query that reads data and thus improves the performance of an application using a database. Working With Indexes In Mysql 365 Data Science Data Science Science Blog Mysql For example the following statement creates a new table with an index that consists of two columns c2 and c3. . CREATE UNIQUE INDEX Index_Name ON TableName ColumnName of the TableName. Query OK 0 rows affected 101 sec Check the description of the table. Here are the steps to create index in MySQL. I dont know about older versions but I know that index creation doesnt block concurrent DML in MySQL 56 for which an RC existed at the time this answer was written and which had been officially released when this answer was lasted edited in May 2013 because I have relied upon this to run multi-hour index creations on production tables while still. ...