An application requires multiple numbers to be assigned at the same time. For example, an application needs to reserve five sequential numbers. Requesting identity values could result in gaps in the series if other processes were simultaneously issued numbers. Callingsp_sequence_get_rangecan retrieve...
按照网上搜索的资料来看,踪标志272让SQL Server使用以前的代码来实现标识列的功能。 That flag sets SQL 2012 back to the prior code for IDENTITY fields. However, unless you are actually running out of numbers, there is no reason to use that flag. IDENTITY fields are unique, not sequential. You ...
Many applications need sequentially incremental number as unique/primarykey of records.SQL Server 2005 today supports identity column as the primary mean to general sequence number, which generates the sequence number upon the execution of DML (insert) or bulk insert.The value of the insertion is k...
{ ON | OFF } | OPTIMIZE_FOR_SEQUENTIAL_KEY = { ON | OFF } | COMPRESSION_DELAY = { 0 | delay [ Minutes ] } | DATA_COMPRESSION = { NONE | ROW | PAGE | COLUMNSTORE | COLUMNSTORE_ARCHIVE } [ ON PARTITIONS ( { partition_number_expression | <range> } [ ,... n ] ) ] | XML...
{ ON | OFF } | OPTIMIZE_FOR_SEQUENTIAL_KEY = { ON | OFF } | COMPRESSION_DELAY = { 0 | delay [ Minutes ] } | DATA_COMPRESSION = { NONE | ROW | PAGE | COLUMNSTORE | COLUMNSTORE_ARCHIVE } [ ON PARTITIONS ( { partition_number_expression | <range> } [ ,... n ] ) ] | XML...
{ ON | OFF } | OPTIMIZE_FOR_SEQUENTIAL_KEY = { ON | OFF } | COMPRESSION_DELAY = { 0 | delay [ Minutes ] } | DATA_COMPRESSION = { NONE | ROW | PAGE | COLUMNSTORE | COLUMNSTORE_ARCHIVE } [ ON PARTITIONS ( { partition_number_expression | <range> } [ ,... n ] ) ] | XML...
{ ON | OFF } | OPTIMIZE_FOR_SEQUENTIAL_KEY = { ON | OFF } | COMPRESSION_DELAY = { 0 | delay [ Minutes ] } | DATA_COMPRESSION = { NONE | ROW | PAGE | COLUMNSTORE | COLUMNSTORE_ARCHIVE } [ ON PARTITIONS ( { partition_number_expression | <range> } [ ,... n ] ) ] | XML...
{ ON | OFF } | OPTIMIZE_FOR_SEQUENTIAL_KEY = { ON | OFF } | IGNORE_DUP_KEY = { ON | OFF } | STATISTICS_NORECOMPUTE = { ON | OFF } | COMPRESSION_DELAY = { 0 | delay [ Minutes ] } } <resumable_index_option> ::= { MAXDOP = max_degree_of_parallelism | MAX_DURATION = ...
It specifies the maximum number of blocks read in one I/O operation during a sequential scan. The total number of I/Os needed to perform a full table scan depends on such factors as the size of the table, the multiblock read count, and whether parallel execution is being utilized for ...
在一个二进制排序中,字符遵照他们的存储位置的值排序,就好像他们在图中的顺序。根据定义,我们可以得出一个二进制排序总是大小写敏感的,同时也是重音敏感的,每一个字符都有一个唯一的字节值 二进制排序是最快的排序操作,因为他们的操作只是对那些值进行简单的一个字节,一个字节比较。