Updating pl sql
Would you like to answer one of these unanswered questions instead?
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.
Instead you can check to see what columns are updated in the body of the trigger by using the UPDATING ('column_name') clause.
The first syntactical form, called a searched update, updates the value of one or more columns for all rows of the table for which the WHERE clause evaluates to TRUE.
There are 2 syntaxes for an update query in Oracle depending on whether you are performing a traditional update or updating one table with data from another table.
You can also perform more complicated updates in Oracle.
You may wish to update records in one table based on values in another table.
However in some cases specifying the partition name can be more efficient than a complicated Specify a complete or partial name of a database link to a remote database where the object is located.
You can compile a positioned update even if the cursor has not been opened yet.
However, removing the open cursor with the JDBC method invalidates the positioned update.
In addition, my related problem was that only some of the columns were modified and many rows had no edits to these columns, so I wanted to leave those alone - basically restore a subset of columns from a backup of the entire table.
If you want to just restore all rows, skip the where clause.
A CREATE or DROP INDEX statement or an ALTER TABLE statement for the target table of a prepared searched update statement invalidates the prepared searched update statement.