Creates a unique index on a table or view. A unique index is one in which no two rows are permitted to have the same index key value. A clustered index on a view must be unique.The Database Engine doesn't allow creating a unique index on columns that already include duplicate values,...
Creates a relational index on a table or view. Also called a rowstore index because it is either a clustered or nonclustered B-tree index. You can create a rowstore index before there is data in the table. Use a rowstore index to improve query performance, especially when the queries ...
[ OPERATION_TYPE_DESC_COLUMN_NAME = operation_type_desc_column_name ] } <table_stretch_options> ::= { [ FILTER_PREDICATE = { NULL | table_predicate_function } , ] MIGRATION_STATE = { OUTBOUND | INBOUND | PAUSED } } <index_option> ::= { PAD_INDEX = { ON | OFF } | FILLFACTOR...
Creates a unique index on a table or view. A unique index is one in which no two rows are permitted to have the same index key value. A clustered index on a view must be unique. The Database Engine does not allow creating a unique index on columns that already include duplicate values...
Oracle does not index table rows in which all key columns are null except in the case of bitmap indexes. Therefore, if you want an index on all rows of a table, then you must either specifyNOTNULLconstraints for the index key columns or create a bitmap index. ...
An index is a schema object and is similar to the index in the back of a book. It allows SQL to find references to particular data based on location within the table. Read thisSQL Server Index Tutorial Overview Importing Data Importing data into a table is most often done via "import/ex...
A default clustered index is created for the history table with an autogenerated name in format IX_<history_table_name>. The clustered index contains the PERIOD columns (end, start).To create the current table as a memory-optimized table, see System-versioned temporal tables with memory-...
Use SQL Server Management StudioCreate a clustered index from Object ExplorerIn Object Explorer, expand the table on which you want to create a clustered index. Right-click the Indexes folder, point to New Index, and select Clustered Index... In the New Index dialog box, on the General page...
Specifies that the SQL Server Database Engine will physically store the computed values in the table, and update the values when any other columns on which the computed column depends are updated. Marking a computed column as PERSISTED lets you create an index on a computed column that is dete...
syntaxsql Copy CREATE TABLE { database_name.schema_name.table_name | schema_name.table_name | table_name } [ AS FileTable ] ( { <column_definition> | <computed_column_definition> | <column_set_definition> | [ <table_constraint> ] [ ,... n ] | [ <table_index> ] } [ ,......