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Oracle PL/SQL Questions
1. What is normalization. 2. Difference between procedure and functions. 3. Oracle 9i Vs 10g. 4. how to improve the performance of a query. 5. %type vs %rowtype. 6. regression testing. 7. deleting the duplicate records without using rowid in oracle. 8. Row chaining. 9. types of cursors.
2021-02-10, 6670👍, 1💬

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Can one execute dynamic SQL from Forms?
Can one execute dynamic SQL from Forms? Yes, use the FORMS_DDL built-in or call the DBMS_SQL database package from Forms. Eg: FORMS_DDL('INSERT INTO X VALUES (' || col_list || ')'); Just note that FORMS_DDL will force an implicit COMMIT and may de-synchronize the Oracle Forms COMMIT mechanism.
2011-04-12, 5656👍, 0💬

What Is PL/SQL Language Case Sensitive
What Is PL/SQL Language Case Sensitive? - Oracle DBA FAQ - Understanding PL/SQL Language Basics PL/SQL language is not case sensitive: Reserved words are not case sensitive. For example: CASE and Case are identical. Variable names and other names are not case sensitive. For example: TOTAL_SALARY and...
2007-05-01, 4824👍, 0💬

How To Place Comments in PL/SQL
How To Place Comments in PL/SQL? - Oracle DBA FAQ - Understanding PL/SQL Language Basics There are two ways to place comments into PL/SQL codes: SQL Statement Style: Starts you comment any where in the line but prefixed with '--'. The comment ends at the end of the line. C Language Style: Starts you...
2007-05-01, 4993👍, 0💬

What Are the Types PL/SQL Code Blocks
What Are the Types PL/SQL Code Blocks? - Oracle DBA FAQ - Understanding PL/SQL Language Basics There are 3 types of PL/SQL code blocks: Anonymous Block - A block of codes with no name. It may contain a declaration part, an execution part, and exception handlers. Stored Program Unit - A block of code...
2007-05-01, 4900👍, 0💬

What Is an Anonymous Block
What Is an Anonymous Block? - Oracle DBA FAQ - Understanding PL/SQL Language Basics An anonymous block is a PL/SQL code block with no name. It consists of three parts: Declaration Part - Defining local variables and local procedures. Declaration part is optional. Execution Part - Defining execution ...
2007-04-30, 5140👍, 0💬

What Is a Named Program Unit
What Is a Named Program Unit? - Oracle DBA FAQ - Understanding PL/SQL Language Basics A named program unit is a PL/SQL code block with an name. It consists of three parts: Declaration Part - Defining the program unit name, calling parameters, local variables and local procedures. Declaration part is...
2007-04-30, 5024👍, 0💬

What Is a Procedure
What Is a Procedure? - Oracle DBA FAQ - Understanding PL/SQL Language Basics A procedure is a named program unit. It consists of three parts: Declaration Part - Defining the procedure name, calling parameters, local variables and local procedures. Declaration part is required. Execution Part - Defin...
2007-04-30, 4849👍, 0💬

What Is a Function
What Is a Function? - Oracle DBA FAQ - Understanding PL/SQL Language Basics A function is a named program unit. It consists of three parts: Declaration Part - Defining the function name, calling parameters, return value type, local variables and local procedures. Declaration part is required. Execut...
2007-04-30, 4669👍, 0💬

How To Declare a Local Variable
How To Declare a Local Variable? - Oracle DBA FAQ - Understanding PL/SQL Language Basics A local variable can be defined in the declaration part with a declaration statement, which is a variable name followed a data type identifier. Below are some examples of declaration statements: PROCEDURE proc_v...
2007-04-30, 5457👍, 0💬

How To Initialize Variables with Default Values
How To Initialize Variables with Default Values? - Oracle DBA FAQ - Understanding PL/SQL Language Basics There are two ways to assign default values to variables at the time of declaration: Using key word DEFAULT - Appending "DEFAULT value" to the end of declaration statements. Using assignment oper...
2007-04-30, 5294👍, 0💬

What Are the Arithmetic Operations
What Are the Arithmetic Operations? - Oracle DBA FAQ - Understanding PL/SQL Language Basics There are 4 basic arithmetic operations on numeric values as shown in the following sample script: PROCEDURE proc_arithmetic AS addition NUMBER; subtraction NUMBER; multiplication NUMBER; division NUMBER; BEG...
2007-04-30, 4816👍, 0💬

How To Assign Values to Variables
How To Assign Values to Variables? - Oracle DBA FAQ - Understanding PL/SQL Language Basics You can use assignment statements to assign values to variables. An assignment statement contains an assignment operator ":=", which takes the value specified on the right to the variable on left. The script b...
2007-04-30, 4949👍, 0💬

What Are the Numeric Comparison Operations
What Are the Numeric Comparison Operations? - Oracle DBA FAQ - Understanding PL/SQL Language Basics PL/SQL supports 6 basic numeric comparison operations as shown in the following sample script: PROCEDURE proc_comparison AS res BOOLEAN; BEGIN res := 1 = 2; res := 1 2; res := 1 = 2; res := 1 2; -- mo...
2007-04-30, 4847👍, 0💬

What Are the Logical Operations
What Are the Logical Operations? - Oracle DBA FAQ - Understanding PL/SQL Language Basics PL/SQL supports 3 logical operations as shown in the following sample script: PROCEDURE proc_comparison AS x BOOLEAN := TRUE; y BOOLEAN := FALSE; res BOOLEAN; BEGIN res = x AND y; res = x OR y; res = NOT x; -- m...
2007-04-30, 5059👍, 0💬

How Many Scalar Data Types Are Supported in PL/SQL
How Many Scalar Data Types Are Supported in PL/SQL? - Oracle DBA FAQ - Understanding PL/SQL Language Basics PL/SQL supports many scalar data types divided into 4 groups: Numeric Types: BINARY_DOUBLE, BINARY_FLOAT, BINARY_INTEGER, DEC, DECIMAL, DOUBLE PRECISION, FLOAT, INT, INTEGER, NATURAL, NATURALN...
2007-04-30, 4633👍, 0💬

How Many Categories of Data Types
How Many Categories of Data Types? - Oracle DBA FAQ - Understanding PL/SQL Language Basics PL/SQL data types are grouped into 4 categories: Scalar Data Types: A scalar data type holds a single value. Composite Data Types: A composite data type has internal components, such as the elements of an arra...
2007-04-30, 5308👍, 0💬

How To Convert Character Types to Numeric Types
How To Convert Character Types to Numeric Types? - Oracle DBA FAQ - Understanding PL/SQL Language Basics You can convert character types to numeric types in two ways: Explicitly by using TO_NUMBER() function. Implicitly by putting character data in a numeric operation. The sample script below shows ...
2007-04-30, 5208👍, 0💬

What Are the Execution Control Statements
What Are the Execution Control Statements? - Oracle DBA FAQ - Understanding PL/SQL Language Basics PL/SQL supports three groups of execution control statements: IF Statements - Conditionally executes a block of statements. CASE Statements - Selectively executes a block of statements. LOOP Statements...
2007-04-30, 4747👍, 0💬

How To Use "IF" Statements on Multiple Conditions
How To Use "IF" Statements on Multiple Conditions? - Oracle DBA FAQ - Understanding PL/SQL Language Basics If you have multiple blocks of codes to be executed based on different conditions, you can use the "IF ... ELSIF" statement. Here is a sample script on IF statements: DECLARE day VARCHAR2; BEGI...
2007-04-29, 7255👍, 0💬

How To Use "WHILE" Statements
How To Use "WHILE" Statements? - Oracle DBA FAQ - Understanding PL/SQL Language Basics If you have a block of codes to be executed repeatedly based a condition, you can use the "WHILE ... LOOP" statement. Here is a sample script on WHILE statements: DECLARE total NUMBER; BEGIN total := 0; WHILE tota...
2007-04-29, 4706👍, 0💬

How To Use "FOR" Statements
How To Use "FOR" Statements? - Oracle DBA FAQ - Understanding PL/SQL Language Basics If you have a block of codes to be executed repeatedly over a range of values, you can use the "FOR ... LOOP" statement. Here is a sample script on FOR statements: DECLARE total NUMBER := 0; BEGIN FOR i IN 1..10 LOO...
2007-04-29, 4857👍, 0💬

What Is NULL in PL/SQL
What Is NULL in PL/SQL? - Oracle DBA FAQ - Understanding PL/SQL Language Basics NULL is a reserved key word and it stands for two things in PL/SQL: NULL is an executable statement, and means doing nothing. NULL is a data balue, and means no value. The following sample script shows you examples of us...
2007-04-29, 4556👍, 0💬

How To Test NULL Values
How To Test NULL Values? - Oracle DBA FAQ - Understanding PL/SQL Language Basics There ate two special comparison operators you can use on NULL values: "variable IS NULL" - Returns TRUE if the variable value is NULL. "variable IS NOT NULL" - Return TRUE if the variable value is not NULL. The followi...
2007-04-29, 5348👍, 0💬

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