- 如果指定CACHE值,ORACLE就可以预先在内存里面放置一些sequence,这样存取的快些。cache里面的取完后,oracle自动再取一组 到cache。 使用cache或许会跳号, 比如数据库突然不正常down掉(shutdown abort),cache中的sequence就会丢失. 所以可以在create sequence的时候用nocache防止这种情况。 2、Alter Sequence 你或者是...
To create a sequence inyour own schema, you must have theCREATESEQUENCEsystem privilege. 在自己模式下创建序列需要create sequence权限 To create a sequence inanother user’s schema, you must have theCREATEANYSEQUENCEsystem privilege. 在其他用户模式下创建序列需要create any sequence权限。 语法:Syntax 如...
Introduction to Oracle CREATE SEQUENCE statement The CREATE SEQUENCE statement allows you to create a new sequence in the database. Here is the basic syntax of the CREATE SEQUENCE statement: CREATE SEQUENCE schema_name.sequence_name [INCREMENT BY interval] [START WITH first_number] [MAXVALUE max...
In Oracle, you can create an autonumber field by using sequences. A sequence is an object in Oracle that is used to generate a number sequence. This can be useful when you need to create a unique number to act as a primary key. The syntax for a sequence is: CREATE SEQUENCE sequence_...
To create a sequence inanother user's schema, you must have theCREATEANYSEQUENCEsystem privilege.在其它用户模式下创建序列须要create any sequence权限。 语法:Syntax 假设不加条件语句,默认创建的序列格式例如以下: -- Create sequence createsequenceSEQ_T ...
Full Create Sequence SyntaxCREATE SEQUENCE <seq_name> INCREMENT BY <integer> START WITH <integer> MAXVALUE <integer> / NOMAXVALUE MINVALUE <integer> / NOMINVALUE CYCLE / NOCYCLE CACHE <#> / NOCACHE ORDER / NOORDER; Create Sequence Simplest FormCREATE SEQUENCE <sequence_name>; ...
SYNTAX: CREATE SEQUENCE [schema.]sequence [INCREMENT BY integer] [START WITH integer] [MAXVALUE integer | NOMAXVALUE] [MINVALUE integer | NOMINVALUE] [CYCLE | NOCYCLE] [CACHE integer | NOCACHE] [ORDER | NOORDER] where: schema is the schema to contain the sequence. If you omit schema,...
To create a sequence inanother user's schema, you must have theCREATEANYSEQUENCEsystem privilege.在其他用户模式下创建序列需要create any sequence权限。 语法:Syntax 如果不加条件语句,默认创建的序列格式如下: -- Create sequence createsequenceSEQ_T ...
This SQL statement always returns an ORA-1722 error because the syntax for CREATE SEQUENCE is ...
DROP SEQUENCE schema_name.sequence_name;Code language: SQL (Structured Query Language) (sql) In this syntax, specify the name of the sequence that you want to remove after the DROP SEQUENCE keywords. If you don’t specify the schema to which the sequence belongs, Oracle will remove the sequ...