);-- create unique indexCREATEUNIQUEINDEXcollege_indexONColleges(college_code); Here, the SQL command creates a unique index namedcollege_indexon theCollegestable using thecollege_codecolumn. Note:Although the index is created for only unique values, the original data in the table remains unaltered...
For our examples, we’ll work with a non-clustered index,IX_ExpectedDeliveryDate, on thePurchasing.PurchaseOrderstable in the WideWorldImporters sample database. To disable with SQL Server Management Studio (SSMS), expand down to the index in the Object Explorer Right-click on the index to di...
These include user-defined type variables or functions and user-defined functions, but can't reference a Transact-SQL statement. partition_number must exist or the statement fails. WITH ( <single_partition_rebuild_index_option> ) SORT_IN_TEMPDB, MAXDOP, DATA_COMPRESSION, and XML_COMPRESSION are...
These include user-defined type variables or functions and user-defined functions, but can't reference a Transact-SQL statement. partition_number must exist or the statement fails. WITH ( <single_partition_rebuild_index_option> ) SORT_IN_TEMPDB, MAXDOP, DATA_COMPRESSION, and XML_COMPRESSION are...
These include user-defined type variables or functions and user-defined functions, but can't reference a Transact-SQL statement. partition_number must exist or the statement fails. WITH ( <single_partition_rebuild_index_option> ) SORT_IN_TEMPDB, MAXDOP, DATA_COMPRESSION, and XML_COMPRESSION are...
For more information about catalog-name values, see Naming conventions in SQL. More than one Db2 subsystem can share the integrated catalog facility catalogs with the current server. To avoid the chance of those subsystems attempting to assign the same name to different data sets, specify a ...
embedding in PL/SQL, 15-20 locks, 24-29 parallel DDL, 23-3 parsing with DBMS_SQL, 15-20 processing statements, 15-15 roles and privileges, 27-21 data dictionary access to, 2-3 adding objects to, 2-5 ALL prefixed views, 2-6 audit trail (SYS.AUD$), 2-5 backups...
In this blog, we provide a comprehensive guide with practical examples of MySQL indexes. Explore MySQL CREATE INDEX, functional indexes and more in MySQL 8.0.
Understand this with the help of some examples. SELECT SUBSTRING_INDEX('Software Testing Help', 'T', -1) as extracted_string; //Output esting Help In the above example, you can see the delimiter is ‘T’ while the count is -1. So the output would be Substring from the right until ...
Examples 1. Basic Index Creation CREATEINDEXidx_customer_idONorders(customer_id); In this example, an index `idx_customer_id` is created on the `customer_id` column of the `orders` table to speed up `JOIN` operations involving this column. ...