How do you declare a PL SQL table of records to hold the rows selected from EMP table?
DECLARE TYPE EmpTabTyp IS TABLE OF emp%ROWTYPE INDEX BY BINARY_INTEGER; emp_tab EmpTabTyp; i BINARY_INTEGER := 0; CURSOR c1 IS SELECT * FROM emp; BEGIN OPEN c1; LOOP i := i + 1; /* Fetch entire row into record stored by ith element.
How can table row column values be assigned to a variable in PL SQL?
A) PL/SQL SELECT INTO – selecting one column example
This variable will hold the customer name. Second, use the SELECT INTO statement to select value from the name column and assign it to the l_customer_name variable. Third, show the customer name using the dbms_output. put_line procedure.
How can you declare a PL SQL table?
As with a record, a PL/SQL table is declared in two stages:
- Define a particular PL/SQL table structure (made up of strings, dates, etc.) using the table TYPE statement. …
- Declare the actual table based on that table type. The declaration of a PL/SQL table is a specific instance of a generic datatype.
How do I create a Rowtype in PL SQL?
You can use the %ROWTYPE attribute in variable declarations as a datatype specifier. Fields in a record and corresponding columns in a row have the same names and datatypes. However, fields in a %ROWTYPE record do not inherit constraints, such as the NOT NULL column or check constraint, or default values.
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. However, the cursor can be reopened and the rows of the new result set can be fetched.
What are row type of variable why they are used?
The %ROWTYPE attribute provides a record type that represents a row in a database table. The record can store an entire row of data selected from the table or fetched from a cursor or cursor variable. … Variables declared using %ROWTYPE are treated like those declared using a datatype name.
What is procedure in PL SQL with example?
Procedure Vs. Function: Key Differences
|Used mainly to a execute certain process||Used mainly to perform some calculation|
|Cannot call in SELECT statement||A Function that contains no DML statements can be called in SELECT statement|
|Use OUT parameter to return the value||Use RETURN to return the value|
What are the types of collection in PL SQL?
PL/SQL – Collections
- Index-by tables or Associative array.
- Nested table.
- Variable-size array or Varray.
What is PL SQL record?
A PL/SQL record is a composite data structure which consists of multiple fields; each has its own value. The following picture shows an example record that includes first name, last name, email, and phone number: PL/SQL record helps you simplify your code by shifting from field-level to record-level operations.
Is PL SQL table is a user defined data type?
PL/SQL allows use from within functions and procedures of the SQL features that support user-defined types. The parameters and variables of PL/SQL functions and procedures can be of user-defined types.
What is the difference between record and collection in Oracle?
In a collection, the internal components always have the same data type, and are called elements. … To create a collection variable, you either define a collection type and then create a variable of that type or use %TYPE . In a record, the internal components can have different data types, and are called fields.