SEQUENCE语法如下: (创建一个序列对象并指定其属性) CREATESEQUENCE[schema_name .]sequence_name[AS [ built_in_integer_type | user-defined_integer_type]][START WITH <constant>][INCREMENT BY <constant>][{ MINVALUE [ <constant>]}|{
SEQUENCE语法如下: (创建一个序列对象并指定其属性) CREATESEQUENCE[schema_name .]sequence_name[AS [ built_in_integer_type | user-defined_integer_type]][START WITH <constant>][INCREMENT BY <constant>][{ MINVALUE [ <constant>]}|{ NO MINVALUE } ][{ MAXVALUE [ <constant>]}|{ NO MAXVALUE...
SQL> INSERT INTO robinson.dept(deptno,dname,loc) 2 VALUES(sys.my_seq.currval,'Customers','HongKong'); VALUES(sys.my_seq.currval,'Customers','HongKong') * ERROR at line 2: ORA-08002: sequence MY_SEQ.CURRVAL is not yet defined in this session --修改currval为nextval,操作成功 SQL> INSERT...
Applies to: SQL Server Azure SQL Database Azure SQL Managed Instance This article explains how to use sequence numbers in SQL Server, Azure SQL Database and Azure SQL Managed Instance. A sequence is a user-defined schema-bound object that generates a sequence of numeric values according to ...
For example, if a cache size of 50 is chosen, SQL Server does not keep 50 individual values cached. It only caches the current value and the number of values left in the cache. This means that the amount of memory required to store the cache is always two instances of the data type...
If the Database Engine is stopped after you use 22 numbers, the next intended sequence number in memory (23) is written to the system tables, replacing the previously stored number. After SQL Server restarts and a sequence number is needed, the starting number is read from the system tables...
SqlParameter firstValueInRange = new SqlParameter("@range_first_value", SqlDbType.Variant); firstValueInRange.Direction = ParameterDirection.Output; cmd.Parameters.Add(firstValueInRange); conn.Open(); cmd.ExecuteNonQuery(); // Output the first value of the generated range. Console.WriteLine(first...
syntaxsql CREATESEQUENCE[schema_name. ]sequence_name[AS[built_in_integer_type| user-defined_integer_type] ] [STARTWITH<constant>] [INCREMENTBY<constant>] [ {MINVALUE[<constant>] } | {NOMINVALUE} ] [ {MAXVALUE[<constant>] } | {NOMAXVALUE} ] [CYCLE| {NOCYCLE} ] [ {CACHE[<constant...
Simulating Sequence Objects in SQL Server 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...
Note To view Transact-SQL syntax for SQL Server 2014 (12.x) and earlier versions, see Previous versions documentation.Argumentssequence_name Specifies the unique name by which the sequence is known in the database. Type is sysname.[ built_in_integer_type | user-defined_integer_type A ...