Only one exception handler is processed before the PL/SQL block is exited, provided an exception occurs.
What is the maximum number of handlers processed before the PI SQL block is exited when an exception occurs?
None, cursor for loops handle cursor opening implicitly. 9. What is the maximum number of handlers processed before the PL/SQL block is exited when an exception occurs? 10.
Which three of the following are implicit cursor attributes?
The latest implicit cursor is called the SQL cursor and has the attributes like %FOUND, %ISOPEN, %NOTFOUND, and %ROWCOUNT.
Which of the following are valid SQL statements inside PL SQL block?
SQL Pseudocolumns. PL/SQL recognizes the SQL pseudocolumns: CURRVAL , LEVEL , NEXTVAL , ROWID , and ROWNUM . In PL/SQL, pseudocolumns are only allowed in SQL queries, not in INSERT / UPDATE / DELETE statements, or in other PL/SQL statements such as assignments or conditional tests.
Which of the following statements about a cursor declaration and definition is true?
Which of the following statements about a cursor declaration and definition is true? An explicit cursor should be declared & defined at the same time in execution block. An explicit cursor should be declared & defined at the same time in declarationblock.
When should a close statement be used in PL SQL?
After all rows have been retrieved from the result set that is associated with a cursor, the cursor must be closed. The result set cannot be referenced after the cursor has been closed.
Where are exceptions used in PL SQL?
An error occurs during the program execution is called Exception in PL/SQL. PL/SQL facilitates programmers to catch such conditions using exception block in the program and an appropriate action is taken against the error condition. There are two type of exceptions: System-defined Exceptions.
What are the attributes of implicit cursor?
An implicit cursor has attributes that return information about the most recently run SELECT or DML statement that is not associated with a named cursor. Note: You can use cursor attributes only in procedural statements, not in SQL statements. SQL%ISOPEN always has the value FALSE .
What is the advantage of cursor in SQL Server?
Cursors can be faster than a while loop but they do have more overhead. It is we can do RowWise validation or in other way you can perform operation on each Row. It is a Data Type which is used to define multi-value variable. Cursors can be faster than a while loop but at the cost of more overhead.
What type of exception requires a raise statement?
The RAISE statement stops normal execution of a PL/SQL block or subprogram and transfers control to an exception handler. RAISE statements can raise predefined exceptions, such as ZERO_DIVIDE or NO_DATA_FOUND , or user-defined exceptions whose names you decide.
How do I run a query in PL SQL?
Assuming you already have a connection configured in SQL Developer:
- from the View menu, select DBMS Output.
- in the DBMS Output window, click the green plus icon, and select your connection.
- right-click the connection and choose SQL worksheet.
- paste your query into the worksheet.
- run the query.
Which data types are used in PL SQL?
PL/SQL uses the SQL character data types such as CHAR , VARCHAR2 , LONG , RAW , LONG RAW , ROWID , and UROWID .
- CHAR(n) is a fixed-length character type whose length is from 1 to 32,767 bytes.
- VARCHAR2(n) is varying length character data from 1 to 32,767 bytes.