Alter table to Delete an Index : Alter Table « Table Index « SQL / MySQL






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Alter table to Delete an Index

     

ALTER TABLE tblname DROP INDEX indexname








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1.Altering Database Tables: Add a Column
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5.Alter table: add unique
6.Alter table: drop primary and foreign key
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8.Altering and Dropping Tables
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10.Alter table to change the order
11.Alter table to add column
12.Alter table to change column sequence
13.Alter table to add columns
14.Alter table to drop primary key
15.Alter table to drop foreign key
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17.Changing the Table Design (ALTER TABLE)
18.Use ALTER TABLE to change the column type
19.The Effect of ALTER TABLE on Null and Default Value Attributes
20.Create the table and then set the initial sequence value with ALTER TABLE
21.Alter table to set the primary key start
22.ALTER TABLE statement modifies the table accordingly
23.Alter table to add primary key, add new column, change column, drop column
24.Using ALTER TABLE command to add the names_num column to the cust_names table
25.Two ALTER TABLE statements can be combined
26.Alter table to add foreign key
27.Syntax for Altering a Column
28.Syntax for altering table and delete a Column
29.Storing Altered Character Strings
30.To drop a default value, use ALTER col_name DROP DEFAULT:
31.ALTER column to BINARY
32.Use the asterisk to try matching against the name ian or the alternative spelling, iain.
33.Specifying Multiple Alterations
34.Alter table to add an index
35.Alter table to add unique index
36.Alter table to add index
37.To drop an index with ALTER TABLE
38.Reduce the number of significant characters per index in the index to the first 16 characters
39.Add IGNORE to the statement, then use SELECT to have a look at the table contents to see how the duplicates ha
40.Change j from INT to BIGINT
41.MODIFY statement should specify the null and default value attributes explicitly
42.Redefine i to be NOT NULL, then try again
43.Change column definition