循环SEQUENCE 从最小值或最大值(而不是从起始值)重新开始。 [ CACHE [<constant> ] | NO CACHE ] 通过最大限度地减少生成序列编号所需的磁盘 IO 数,可以提高使用序列对象的应用程序的性能。 默认值为 CACHE。 例如,如果选择的缓存大小为 50,SQL Server 并不会缓存 50 个单个值。 它只是缓存当前值和缓存...
CREATE SEQUENCE (Transact-SQL) 發行項 2025/01/03 14 位參與者 意見反應 本文內容 語法 引數 一般備註 中繼資料 顯示其他 3 個 適用於: SQL Server Azure SQL 資料庫 Azure SQL 受控執行個體 建立順序物件,並指定其屬性。 序列是使用者定義之結構描述繫結的物件,該物件會根據建立序列所使用的規格產生...
--1. 使用序列 (Sequence) https://docs.microsoft.com/zh-cn/sql/t-sql/statements/create-sequence-transact-sql?view=sql-server-ver15 --2. 为SQL Server 注册启动参数 -t272 IF EXISTS(SELECT*FROMsys.sequencesWHEREname= N'Id_Sequence') DROPSEQUENCEId_Sequence; GO CREATESEQUENCEId_Sequence ASINT ...
After SQL Server restarts and a sequence number is needed, the starting number is read from the system tables (23). The cache amount of 15 numbers (23-38) is allocated to memory and the next non-cache number (39) is written to the system tables....
After SQL Server restarts and a sequence number is needed, the starting number is read from the system tables (23). The cache amount of 15 numbers (23-38) is allocated to memory and the next non-cache number (39) is written to the system tables....
To improve performance, SQL Server pre-allocates the number of sequence numbers specified by theCACHEargument. For an example, a new sequence is created with a starting value of 1 and a cache size of 15. When the first value is needed, values 1 through 15 are made available from memory....
sequence-name Names the sequence. The name, including the implicit or explicit qualifiers, must not identify an existing sequence at the current server, including the sequence names that are generated byDB2®. The schema name must not begin with 'SYS' unless the schema name is 'SYSADM'. ...
向当前数据库里增加一个新的序列。序列的Owner为创建此序列的用户。SEQUENCE是一个存放等差数列的特殊表,该表受DBMS控制。这个表没有实际意义,通常用于为行或者表生成唯一的标识符。如果给出一个模式名,则该序列就在给定的模式中创建,否则会在当前模式中创建。序列名必
The CREATE SEQUENCE statement defines a sequence at the application server.Invocation This statement can be embedded in an application program or issued through the use of dynamic SQL statements. It is an executable statement that can be dynamically prepared only if DYNAMICRULES run behavior is in...
CREATE ROLE (Transact-SQL) CREATE ROUTE (Transact-SQL) CREATE RULE (Transact-SQL) CREATE SCHEMA (Transact-SQL) CREATE SEARCH PROPERTY LIST (Transact-SQL) CREATE SEQUENCE (Transact-SQL) CREATE SERVER AUDIT (Transact-SQL) CREATE SERVER AUDIT SPECIFICATION (Transact-SQL) ...