The ALTER TABLE statement doesn't allow several index creation options.In addition, both SQL Server 7.0 and 2000 give us the sp_indexoption system stored procedure that allows us to specify locking options on indexes. SQL7 allows us to inspect and set "AllowRowLocks" and "AllowPageLocks," ...
SqlBooleanExpressionError SqlBooleanFilterExpression SqlBooleanOperatorType SqlBreakStatement SqlBucketCountIndexOption SqlBuiltinScalarFunctionCallExpression SqlCaseExpression SqlCastExpression SqlChangeTrackingContext SqlCheckConstraint SqlClrAssemblySpecifier SqlClrClassSpecifier SqlClrFunctionBodyDefinition Sq...
For example, if a single statement inserts 20 rows into a table with a unique index, and 10 of those rows contain duplicate key values, by default all 20 rows are rejected. However, if the index option IGNORE_DUP_KEY is ON, only the 10 duplicate key values will be rejected; the other...
SqlServer.TransactSql.ScriptDom AbortAfterWaitType AcceleratedDatabaseRecoveryDatabaseOption AddAlterFullTextIndexAction AddFileSpec AddMemberAlterRoleAction AddSearchPropertyListAction AddSensitivityClassificationStatement AddSignatureStatement AdHocDataSource AdHocTableReference AffinityKind AlgorithmKeyOption Allow...
指涉条件约束只能指涉唯一的数据行集合，必须要有主索引键或唯一的条件约束，因此您必须在users(username...
You can set theUniqueValuesproperty in the query's property sheet or in SQL view of the Query window. Note:You can set this property when you create a new query by using an SQL statement. The DISTINCT predicate corresponds to theUniqueValuesproperty setting. The DISTINCTROW predicate corresponds...
If this option is set to Yes and you attempt to create duplicate keys by adding data that affects multiple rows (with the INSERT statement), the row containing a duplicate is not added. If it is set to No, the entire insert operation fails and all the data is rolled back. Note You ...
You can set theUniqueRecordsproperty in the query's property sheet or in SQL view of the Query window. Note:You set this property when you create a new query by using an SQL statement. The DISTINCTROW predicate corresponds to theUniqueRecordsproperty setting. The DISTINCT predicate corresponds ...
But current engine behavior is different for one specific case, if you use the statement ALTER INDEX ALL ON <TABLE> REBUILD WITH (ONLINE = ON) , it will reset the uniqueifiers (across all version starting SQL Server 2005 to SQL Server 2017)....
However, the next statement fails, because c1 is part of the partitioning key, but is not part of the proposed primary key: # fails with error 1503 mysql> ALTER TABLE t_no_pk ADD PRIMARY KEY(c2); ERROR 1503 (HY000): A PRIMARY KEY must include all columns in the table's partit...