To manipulate data in the database use DML statements
INSERT, UPDATE and DELETE in PL/SQL
INSERT
DECLARE
v_empno emp.empno%TYPE := &empno;
v_ename emp.ename%TYPE := '&ename';
v_salary emp.sal%TYPE := &sal;
BEGIN
INSERT INTO emp
(empno, ename, sal
)
VALUES (v_empno, v_ename, v_salary
);
COMMIT;
END;
UPDATE
DECLARE
v_empno emp.empno%TYPE;
v_salary emp.sal%TYPE := &sal;
BEGIN
UPDATE emp
SET sal = v_salary
WHERE empno = 1234;
COMMIT;
END;
DELETE
DECLARE
v_empno emp.empno%TYPE := &eno;
BEGIN
DELETE emp
WHERE empno = v_empno;
COMMIT;
END;
Sequence Object
CREATE SEQUENCE MySeq
INCREMENT BY 1
START WITH 1
MAXVALUE 99999
NOCACHE
NOCYCLE;
INSERT INTO emp (empno) VALUES(MySeq.NEXTVAL);
Sequence Object: Example
CREATE SEQUENCE seq_emp;
SET SERVEROUTPUT ON
DECLARE
v_empno emp.empno%TYPE;
BEGIN
-- Using a sequence to autogenerate the primary key column values
INSERT INTO emp
(empno, ename
)
VALUES (seq_emp.NEXTVAL, 'Daya'
)
RETURNING empno
INTO v_empno;
/* Displaying the value of the sequence that is inserted in the table */
DBMS_OUTPUT.put_line(v_empno);
END;
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ReplyDeleteManipulating Data in PL/SQL being contrived to exist for many projects simply so it can be run will be the first to hit the wall, but those projects where the functions to make existing transactions cheaper in real world applications will find the elusive real world demand.
1) This is my question that needs to be answered.
option or create a simple materialized view.
select IR.rowid MV_INST_LOBR_ROWID, J.rowid Job_ROWID, J.* FROM JOB J
LEFT JOIN MV_INST_LOB_R IR ON
(IR.I1503_CUST_AC_NO_PT1 = J.I3200_CUST_AC_NO_PT1 AND IR.I1503_CUST_AC_NO_PT2 = J.I3200_CUST_AC_NO_PT2 AND IR.I1503_INST_SEQ_NO = J.I3200_INST_SEQ_NO)
WHERE IR.I1503_CUST_AC_NO_PT1 IS NOT NULL AND IR.I1503_CUST_AC_NO_PT2 IS NOT NULL
UNION SELECT null, J.rowid Job_ROWID, J.* FROM JOB J WHERE J.I3200_CUST_AC_NO_PT1 IS NULL AND J.I3200_CUST_AC_NO_PT1 IS NULL;
Basically, the intention is to get all the records joining MV_INST_LOB_R and JOB table
where MV_INST_LOB_R do not have record for the joining condition J.I3200_CUST_AC_NO_PT1 / J.I3200_CUST_AC_NO_PT2
I am trying to use this in a materialized view and got below error:
SQL Error: ORA-12015: cannot create a fast refresh materialized view from a complex query. I have searched for help on the internet and still have not found a solution.
12015. 00000 - "cannot create a fast refresh materialized view from a complex query"
*Cause: Neither ROWIDs and nor primary key constraints are supported for
complex queries.
*Action: Reissue the command with the REFRESH FORCE or REFRESH COMPLETE
Can you help me in converting to simple query, so that I can use simple materialized view.
It was cool to see your article pop up in my google search for the process yesterday. Great Guide.
Keep up the good work!
Thank you,
Preethi
Hello There,
ReplyDeleteFully agree on Manipulating Data in PL/SQL . We’re seeing a lot of projects tackle big complex problems but few seem to have taken into consideration and in particular reasons to adopt.
My table column type is clob. Field value contain double quotes
id,text_clob,date
1,"\"data1\",0,1,1,1,\"data2\"","2018-03-03 09:08:45"
can you kindly help loader query. i cant use replace in clob field.
It was cool to see your article pop up in my google search for the process yesterday. Great Guide.
Keep up the good work!
Thank you,
Preethi.
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