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Updating a table in pl sql

updating a table in pl sql-32

They are not permanent until they are confirmed using the statement.

updating a table in pl sql-50updating a table in pl sql-79updating a table in pl sql-64

Data Definition Language (DDL) commands perform an implicit commit, which also confirms all outstanding DML changes in the current session.We are going to update column DESCRIPTION and PICTURE in table Categories_Test by using data in table Categories, based on data in the common column CATEGORY_ID. Update data in a column in table A based on a common column in table B. Update data in two columns in table A based on a common column in table B. Conditionally update data in table A based on a common column in table B. No portion may be reproduced without my written permission.The update query below shows that the PICTURE column is updated by looking up the same ID value in CATEGORY_ID column in table Categories_Test and Categories. If you need to update multiple columns simultaneously, use comma to separate each column after the SET keyword. Here we only want to update PICTURE column in Categories_Test table where the data in Category_Name column is Seafood in table Categories. Software and hardware names mentioned on this site are registered trademarks of their respective companies.Use the WHEN clause to prevent the trigger from firing for every insert and update.After that, you can just set the :new.[column name] values and allow the driving transaction to perform it's own commit or rollback.Cross table update (also known as correlated update, or multiple table update) in Oracle uses non-standard SQL syntax format (non ANSI standard) to update rows in another table. Update data in table A based on two or more common columns in table B.

The differences in syntax are quite dramatic compared to other database systems like MS SQL Server or My SQL. Updates based on two or more common columns are normally used for tables where multiple columns work together as a primary key (known as composite primary key).

Oracle Tutorials Oracle Tutorials - Update a Table Row with a RECORD By: (Continued from previous topic...) How To Update a Table Row with a RECORD?

If you have a RECORD variable with data fields matching a table structure, you can update a row in this table with this RECORD variable using the UPDATE ...

Balaji Do use the WHEN clause for improved performance. create or replace trigger Trig On Test1 BEFORE insert or update on mytest1 referencing OLD as old NEW as new for each row WHEN (new.col1 = 100) begin :new.col3 = 500; end; Brian updating/inserting inside of these procedures, they should be returning values back to the trigger and then you populate these values into :new.column thx" id="ctl00_m_m_i_ctl00_gr_ctl13_bestanswerbody" class="textarea-bestanswerhidden" name="bestanswerbody" answerbody Id="1455208" / you can call any number of procedure, but instead of updating/inserting inside of these procedures, they should be returning values back to the trigger and then you populate these values into :new.column thx create or replace trigger TRBIU_Test Employees before insert or update on Employees referencing OLD as old NEW as new for each row WHEN (new.employee_id = 1001) begin :new.email := [email protected]'; end; Hope this would help!

create or replace trigger Trig On Test1 BEFORE insert or update on mytest1 referencing OLD as old NEW as new for each row WHEN (new.col1 = 100) begin :new.col3 = 500; end; Brian" id="ctl00_m_m_i_ctl00_gr_ctl09_bestanswerbody" class="textarea-bestanswerhidden" name="bestanswerbody" answerbody Id="1455177" / oops, yes - Roman is right. Nidhi" id="ctl00_m_m_i_ctl00_gr_ctl15_bestanswerbody" class="textarea-bestanswerhidden" name="bestanswerbody" answerbody Id="1455206" / you can use before insert or update trigger, something like this create or replace trigger TRBIU_Test Employees before insert or update on Employees referencing OLD as old NEW as new for each row WHEN (new.employee_id = 1001) begin :new.email := [email protected]'; end; Hope this would help!

--DROP TABLE employees PURGE; --DROP TABLE departments PURGE; CREATE TABLE departments ( department_id NUMBER(2) CONSTRAINT departments_pk PRIMARY KEY, department_name VARCHAR2(14), location VARCHAR2(13) ); INSERT INTO departments VALUES (10,'ACCOUNTING','NEW YORK'); INSERT INTO departments VALUES (20,'RESEARCH','DALLAS'); INSERT INTO departments VALUES (30,'SALES','CHICAGO'); INSERT INTO departments VALUES (40,'OPERATIONS','BOSTON'); COMMIT; CREATE TABLE employees ( employee_id NUMBER(4) CONSTRAINT employees_pk PRIMARY KEY, employee_name VARCHAR2(10), job VARCHAR2(9), manager_id NUMBER(4), hiredate DATE, salary NUMBER(7,2), commission NUMBER(7,2), department_id NUMBER(2) CONSTRAINT emp_department_id_fk REFERENCES departments(department_id) ); INSERT INTO employees VALUES (7369,'SMITH','CLERK',7902,to_date('','dd-mm-yyyy'),800, NULL,20); INSERT INTO employees VALUES (7499,'ALLEN','SALESMAN',7698,to_date('20-2-1981','dd-mm-yyyy'),1600,300,30); INSERT INTO employees VALUES (7521,'WARD','SALESMAN',7698,to_date('22-2-1981','dd-mm-yyyy'),1250,500,30); INSERT INTO employees VALUES (7566,'JONES','MANAGER',7839,to_date('2-4-1981','dd-mm-yyyy'),2975, NULL,20); INSERT INTO employees VALUES (7654,'MARTIN','SALESMAN',7698,to_date('28-9-1981','dd-mm-yyyy'),1250,1400,30); INSERT INTO employees VALUES (7698,'BLAKE','MANAGER',7839,to_date('1-5-1981','dd-mm-yyyy'),2850, NULL,30); INSERT INTO employees VALUES (7782,'CLARK','MANAGER',7839,to_date('9-6-1981','dd-mm-yyyy'),2450, NULL,10); INSERT INTO employees VALUES (7788,'SCOTT','ANALYST',7566,to_date('13-JUL-87','dd-mm-rr')-85,3000, NULL,20); INSERT INTO employees VALUES (7839,'KING','PRESIDENT', NULL,to_date('','dd-mm-yyyy'),5000, NULL,10); INSERT INTO employees VALUES (7844,'TURNER','SALESMAN',7698,to_date('8-9-1981','dd-mm-yyyy'),1500,0,30); INSERT INTO employees VALUES (7876,'ADAMS','CLERK',7788,to_date('13-JUL-87', 'dd-mm-rr')-51,1100, NULL,20); INSERT INTO employees VALUES (7900,'JAMES','CLERK',7698,to_date('3-12-1981','dd-mm-yyyy'),950, NULL,30); INSERT INTO employees VALUES (7902,'FORD','ANALYST',7566,to_date('3-12-1981','dd-mm-yyyy'),3000, NULL,20); INSERT INTO employees VALUES (7934,'MILLER','CLERK',7782,to_date('23-1-1982','dd-mm-yyyy'),1300, NULL,10); COMMIT; These tables are a variant of the EMP and DEPT tables from the SCOTT schema.