1. GENERATED [ALWAYS] AS IDENTITY 此时ALWAYS关键字是可选的: createtabletb_test ( id number GENERATED ALWAYSASIDENTITY, name varchar2(100) ); 此时试图插入指定ID字段的元组将报错,因为ID字段总是自动生成的,例如,执行下述语句: INSERTINTOTB_TESTVALUES(1,'Zyon'); 将报: ORA-32795: 无法插入到“始...
[Err] ORA-32795: cannot insert into a generated always identity column 无法插入到“始终生成”身份列 插入测试3: INSERTINTOidentity_test_tab (id, description)VALUES(999,'ID=999 and DESCRIPTION') [SQL]INSERT INTO identity_test_tab (id, description) VALUES (999, 'ID=999 and DESCRIPTION') [Er...
insert into id_t values(3,'test') * ERROR at line 1: ORA-32795: cannot insert into a generated always identity column SQL> alter table id_t modify(s_key number generated by default as identity); Table altered. SQL> insert into id_t values(4,'america'); 1 row created. SQL> commit...
INSERT INTO table_name (column1, column2) VALUES (value1, value2); “` 使用标识列(Identity Column) 从Oracle 12c开始,可以直接在表中定义一个标识列,该列会在插入新行时自动递增。 1、创建表 在创建表的时候,定义一个标识列: “`sql CREATE TABLE table_name ( id NUMBER GENERATED ALWAYS AS IDEN...
1 identity 2 column SQL> 尝试插⼊数据：SQL> insert into id_t values(3,'test');insert into id_t values(3,'test')* ERROR at line 1:ORA-32795: cannot insert into a generated always identity column SQL> alter table id_t modify(s_key number generated by default as identity);Table ...
Select TABLE_NAME, COLUMN_NAME, DATA_DEFAULT from USER_TAB_COLUMNS where TABLE_NAME = 'IDENTITY_TEST_TABLE'; 对我来说,这个值是“ISEQ$$_193606” 插入一些值。 INSERT INTO IDENTITY_TEST_TABLE (name) VALUES ('atilla'); INSERT INTO IDENTITY_TEST_TABLE (name) VALUES ('aydın'); 然后...
INSERT INTO transaction2 (transaction_id,holding_id,transaction_type,transaction_date,credit_value) VALUES (50,100,1,SYSDATE,300); will result in an error: ORA-32795: cannot insert into a generated always identity column Values can be generated automatically if no values are specified explicitly ...
insert into tab_sql_idnty2 values (NULL,‘name1’) * ERROR at line 1: ORA-32795: cannot insert into a generated always identity column SQL> insert into tab_sql_idnty2(name) values (‘name1’); 1 row created. SQL> insert into tab_sql_idnty2(name) values (‘name2’); ...
INSERTINTOtasks(title)VALUES('Learn Oracle identity column in 12c');INSERTINTOtasks(title)VALUES('Verify contents of the tasks table'); 最后,从任务表中查询数据: SELECTid,titleFROMtasks; 5. 删除(DROP)Sequence 要删除序列,它必须在您的模式中,或者您必须具有drop ANY sequence权限才能删除其他模式中的...
在Oracle中插入不带自动增量主键的值可以通过以下步骤完成: 1. 创建表时不设置自动增量主键:在创建表时,不使用自动增量主键(如IDENTITY列或序列)来定义主键字段。例如,创建一个名为"ta...