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CREATE TABLE TEST
(
ID NUMBER PRIMARY KEY,
NAME VARCHAR2(20)
);
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CREATE SEQUENCE SEQ_TEST;
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CREATE OR REPLACE TRIGGER AUTOINCREMENT
BEFORE INSERT ON TEST
FOR EACH ROW
WHEN (NEW.ID IS NULL)
BEGIN
SELECT SEQ_TEST.NEXTVAL INTO :NEW.ID from DUAL;
END;
/
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INSERT INTO TEST(NAME) VALUES('increase');
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SELECT * from TEST;
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declare
n number(10);
tsql varchar2(100);
begin
select test_seq.nextval into n from dual;
n:=-(n-1);
tsql:='alter ......
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OERR: ORA-12519 TNS:no appropriate service handler found
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Cause: the listener could not find any available service handlers that are
appropriate fo ......