The CREATE INDEX statement creates a partitioning index or a secondary index and an index space at the current server. The columns included in the key of the index are columns of a table at the current server. Invocation for CREATE INDEX This statement can be embedded in an application ...
DROP INDEX index_name ON table_name; SQL Server:DROP INDEX table_name.index_name; DB2/Oracle:DROP INDEX index_name; MySQL:ALTER TABLE table_nameDROP INDEX index_name; Exercise? What is the purpose of the SQL CREATE INDEX statement? To create a backup of a table To retrieve data more ...
CREATE INDEXStatement will look like this: CREATE[UNIQUE]INDEX[INDEX NAME] ON TABLE[COLUMN NAME] EXAMPLE : Want to create aINDEXon TableUserswhich is including column namesuser_fnameanduser_lname. SQL Statement: CREATE INDEXuser_name ONUsers (user_fname, user_lname)...
Learn more about the Microsoft.SqlServer.TransactSql.ScriptDom.CreateIndexStatement.CreateIndexStatement in the Microsoft.SqlServer.TransactSql.ScriptDom namespace.
Here, the SQL command creates an index namedcollege_indexon theCollegestable using thecollege_codecolumn. SQL CREATE INDEX Syntax The syntax of the SQLCREATE INDEXstatement is: CREATEINDEXindex_nameONtable_name (column_name1, column_name2, ...); ...
CreateIndexStatement 型別公開下列成員。方法展開資料表 名稱說明 Accept Indicates the entry point for a given visitor. (覆寫 TSqlFragment.Accept(TSqlFragmentVisitor)。) AcceptChildren Accepts visitor for Children. (覆寫 IndexStatement.AcceptChildren(TSqlFragmentVisitor)。) Equals (繼承自 Object。) ...
CREATE INDEX sql-statement ::=CREATE [UNIQUE] INDEX [IF NOT EXISTS] [database-name .] index-name ON table-name ( column-name [, column-name]* )column-name ::=name [ COLLATE collation-name] [ ASC | DESC CREATE INDEX命令由"CREATE INDEX"关键字后跟新索引的名字,关键字"ON",待索引表的...
Server: Msg 2601, Level 14, State 1, Line 1 Cannot insert duplicate key row in object 'UnitMeasure' with unique index 'AK_UnitMeasure_Name'. The statement has been terminated. F. 使用 IGNORE_DUP_KEY 选项 以下示例首先在该选项设置为 IGNORE_DUP_KEY 时在临时表中插入多行,然后在该选项设置...
Also, a view definition cannot include ntext, text, or image columns, even if they are not referenced in the CREATE INDEX statement. You can create indexes on CLR user-defined type columns if the type supports binary ordering. You can also create indexes on computed columns that are defined...
CREATE [ UNIQUE ] INDEXindexONtable(field[ASC|DESC][,field[ASC|DESC], …]) [WITH { PRIMARY | DISALLOW NULL | IGNORE NULL }] The CREATE INDEX statement has these parts: PartDescription indexThe name of the index to be created.