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. Remove Index From Tables To removeINDEXfrom a table, we can use theDROP ...
其中包括用户定义类型变量或函数以及用户定义函数,但不能引用 Transact-SQL 语句。 partition_number 必须存在,否则,该语句将失败。 WITH ( <single_partition_rebuild_index_option> ) SORT_IN_TEMPDB、MAXDOP、DATA_COMPRESSION和XML_COMPRESSION 是使用 (PARTITION = partition_number) 语法重新生成单个分区时可以指定...
PL/SQL, 17-2, 17-6 contrasted with procedures, 1-55, 17-2 DETERMINISTIC, 20-8 parallel execution, 23-47 privileges for, 27-7 roles, 27-20 See also procedures SQL, 15-3 COUNT, 10-38 default column values, 10-9 in CHECK constraints, 25-21 in views, 10-15 NVL...
Using the keyword ALL with this operationFails if the table has one or more REBUILD WITH ONLINE = ON XML indexSpatial indexColumnstore index in SQL Server 2017 (14.x) and older versions only. Later versions support online rebuild of columnstore indexes. REBUILD PARTITION = <partition_number> ...
SQL INSERT example, C-2 SQL*Loader example, C-3 loading thesaurus, 11-2 LOB columns loading, C-3 LOG_DIRECTORY system parameter, 2-74, 8-4 LOGFILENAME procedure, 8-4 logging index requests, 8-6 logical operators with NEAR, 3-32 LONG columns indexing, 1-22 long_wor...
SQL USEmaster; GO-- In this example, OBJECT_ID is evaluated in the context of the master database.-- Because Person.Address does not exist in master, the function returns NULL.-- When NULL is specified as an object_id, all objects in the database are r...
To set different types of data compression for different partitions, specify theDATA_COMPRESSIONoption more than once, for example: SQLCopy --For rowstore tablesREBUILDWITH( DATA_COMPRESSION =NONEONPARTITIONS(1), DATA_COMPRESSION =ROWONPARTITIONS(2,4,6TO8), DATA_COMPRESSION = PAGEONPARTITIONS(3,...
The following example returns information for all indexes and partitions of thePerson.Addresstable in the AdventureWorks2022 database. Executing this query requires, at a minimum, CONTROL permission onPerson.Addresstable. Important When you are using the Transact-SQL functions DB_ID and OBJECT_ID to...
2 A Sch-M object lock with the resource subtype INDEX_OPERATION prevents the execution of concurrent data definition language (DDL) operations on the source and preexisting structures while the index operation is in progress. For example, this lock prevents concurrent rebuild of two indexes on the...
SQL USEmaster; GO-- In this example, OBJECT_ID is evaluated in the context of the master database.-- Because Person.Address does not exist in master, the function returns NULL.-- When NULL is specified as an object_id, all objects in the database are retu...