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column_n: It specifies the columns that you want to update. 3) conditions: It specifies the conditions that must be fulfilled for execution of UPDATE stateme.2) expression1, expression2, ...expression_n: This specifies the values to assign to the column1, column2, ? This example will update the supplier_name as "Kingfisher" where "supplier_id" is 2.I need to perform this update on a base table in application that should not be altered. Can you guys please help me in this through PL/SQL procedure as I am not much experienced on that. 1 declare 2 v1 varchar2(500); 3 begin 4 select field1 into v1 from long_test; 5 dbms_output.put_line(v1); 6 update long_test set field2 = v1; 7* end; SQL> /" id="ctl00_m_m_i_ctl00_gr_ctl11_bestanswerbody" class="textarea-bestanswerhidden" name="bestanswerbody" answerbody Id="5020855" / Select the long data into a variable. This worked fine for me to the records having length up to 4000. Can anyone please help me out as its an urgent requirement.....thanks in advance." id="ctl00_m_m_i_ctl00_gr_ctl13_bestanswerbody" class="textarea-bestanswerhidden" name="bestanswerbody" answerbody Id="5023089" / Hi All, With all of your valuable suggestions, i had came to an approach but got hanged in the middle. Created a temporary table for the table that i want to update. converted the column in temporary table having long data type to CLOB. Applied the REPLACE operation which i want to perform on that temporary table. Updated contents in main table with contents from temporary table. ORA-22835: Buffer too small for CLOB to CHAR or BLOB to RAW conversion (actual: 4790, maximum: 4000) The other hard part is that main table can't be done any alteration.This worked fine for me to the records having length up to 4000. Can anyone please help me out as its an urgent requirement.....thanks in advance.All INSTEAD OF triggers are fired for each row and you cannot narrow down the event by column.Instead you can check to see what columns are updated in the body of the trigger by using the UPDATING ('column_name') clause.Data manipulation language (DML) statements query and manipulate data in existing schema objects.These statements do not implicitly commit the current transaction. Manager’, ’8-aug-1998’,2000); If you want to add a new row by supplying values for some columns not all the columns then you have to mention the name of the columns in insert statements.

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Some examples of DDL can be can be one condition, or multiple, dependent on what you need. be that you want to update just customers that are located in one area of the [email protected]_horse_with_no_name: Oracle does not directly support the JOIN keyword in an UPDATE, but it allows UPDATE involving JOIN operations between table in at least 2 different ways, look at the accepted answer here: stackoverflow.com/questions/2446764/…You could create a trigger on table B that updates table A every time field_2 on table B is updated.UPDATE dest_tab tt SET (tt.code, tt.description) = (SELECT st.code, st.description FROM source_tab st WHERE = tt.id) WHERE EXISTS (SELECT 1 FROM source_tab WHERE id = tt.id); 5000 rows updated.SQL ----------------------------------------------------------------------------------------------- | Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time | ----------------------------------------------------------------------------------------------- | 0 | UPDATE STATEMENT | | 4999 | 185K| 30013 (34)| | | 1 | UPDATE | dest_tab | | | | | | 2 | NESTED LOOPS SEMI | | 4999 | 185K| 19 (6)| | | 3 | TABLE ACCESS FULL | dest_tab | 10000 | 332K| 18 (0)| | |* 4 | INDEX UNIQUE SCAN | source_tab_PK | 2500 | 10000 | 0 (0)| | | 5 | TABLE ACCESS BY INDEX ROWID| source_tab | 1 | 43 | 2 (0)| | |* 6 | INDEX UNIQUE SCAN | source_tab_PK | 1 | | 1 (0)| | ----------------------------------------------------------------------------------------------- Predicate Information (identified by operation id): --------------------------------------------------- 4 - access("ID"="TT"."ID") 6 - access("ST"."ID"=: B1) UPDATE (SELECT tt.id, tt.code, tt.description, AS st_code, st.description AS st_description FROM dest_tab tt, source_tab st WHERE = st.id) ilv SET = ilv.st_code, ilv.description = ilv.st_description; 5000 rows updated.For example We want to change the name of employee no 102 from ‘Sami’ to ‘Mohd Sami’ and to raise the salary by 10%. update emp set name=’Mohd Sami’, sal=sal (sal*10/100) where empno=102; Now we want to raise the salary of all employees by 5%.update emp set sal=sal (sal*5/100); Now to change the names of all employees to uppercase.create table Employee( 2 ID VARCHAR2(4 BYTE) NOT NULL, 3 First_Name VARCHAR2(10 BYTE), 4 Last_Name VARCHAR2(10 BYTE), 5 Start_Date DATE, 6 End_Date DATE, 7 Salary Number(8,2), 8 City VARCHAR2(10 BYTE), 9 Description VARCHAR2(15 BYTE) 10 ) 11 / Table created.SQL select * from Employee 2 / ID FIRST_NAME LAST_NAME START_DAT END_DATE SALARY CITY DESCRIPTION ---- -------------------- -------------------- --------- --------- ---------- ---------- --------------- 01 Jason Martin 25-JUL-96 25-JUL-06 1234.56 Toronto Programmer 02 Alison Mathews 21-MAR-76 21-FEB-86 6661.78 Vancouver Tester 03 James Smith 12-DEC-78 15-MAR-90 6544.78 Vancouver Tester 04 Celia Rice 24-OCT-82 21-APR-99 2344.78 Vancouver Manager 05 Robert Black 15-JAN-84 08-AUG-98 2334.78 Vancouver Tester 06 Linda Green 30-JUL-87 04-JAN-96 4322.78 New York Tester 07 David Larry 31-DEC-90 12-FEB-98 7897.78 New York Manager 08 James Cat 17-SEP-96 15-APR-02 1232.78 Vancouver Tester 8 rows selected.To achieve the above we can give a multi table INSERT statement given below Insert all Into week_sales(prodid,prodname,weekday,amount) Values (prodid,prodname,’Mon’,mon_amt) Into week_sales(prodid,prodname,weekday,amount) Values (prodid,prodname,’Tue’,tue_amt) Into week_sales(prodid,prodname,weekday,amount) Values (prodid,prodname,’Wed’,wed_amt) Into week_sales(prodid,prodname,weekday,amount) Values (prodid,prodname,’Thu’,thu_amt) Into week_sales(prodid,prodname,weekday,amount) Values (prodid,prodname,’Fri’,fri_amt) Into week_sales(prodid,prodname,weekday,amount) Values (prodid,prodname,’Sat’,sat_amt) Select prodid,prodname,mon_amt,tue_amt,wed_amt,thu_amt Fri_amt,sat_amt from sales; Update statement is used to update rows in existing tables which is in your own schema or if you have update privilege on them.For example to raise the salary by Rs.500 of employee number 104. update emp set sal=sal 500 where empno = 104; In the above statement if we did not give the where condition then all employees salary will be raised by Rs. That’s why always specify proper WHERE condition if don’t want to update all employees.

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