Identical declarations using NUMBER subtypes. : Number « PL SQL Data Types « Oracle PL/SQL Tutorial

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Oracle PL/SQL Tutorial » PL SQL Data Types » Number 
21. 14. 3. Identical declarations using NUMBER subtypes.
SQL>
SQL> SET SERVEROUTPUT ON
SQL> DECLARE
  2    num_dec     DECIMAL(5,2);
  3    num_int     INTEGER(5,2);
  4    num_dbl     DOUBLE PRECISION(5);
  5    num_num     NUMERIC(5,2);
  6    num_real    REAL(5);
  7    num_sint    SMALLINT(5,2);
  8     --decimal precision / 0.30103 = binary precision,
  9     --so 5/.30103 16.6. Round it up to 17.
 10     num_flt     FLOAT(17);
 11    BEGIN
 12     num_dec := 123.456;
 13     num_int := 123.456;
 14     num_dbl := 123.456;
 15     num_num := 123.456;
 16     num_real := 123.456;
 17     num_sint := 123.456;
 18     num_flt := 123.456;
 19     DBMS_OUTPUT.PUT_LINE(num_dec);
 20     DBMS_OUTPUT.PUT_LINE(num_int);
 21     DBMS_OUTPUT.PUT_LINE(num_dbl);
 22     DBMS_OUTPUT.PUT_LINE(num_num);
 23     DBMS_OUTPUT.PUT_LINE(num_real);
 24     DBMS_OUTPUT.PUT_LINE(num_sint);
 25     DBMS_OUTPUT.PUT_LINE(num_flt);
 26   END;
 27   /
123.46
123.46
120
123.46
120
123.46
123.456

PL/SQL procedure successfully completed.

SQL>
21. 14. Number
21. 14. 1. NUMBER
21. 14. 2. NUMBER Subtypes
21. 14. 3. Identical declarations using NUMBER subtypes.
21. 14. 4. Number type variable
21. 14. 5. Assign value to NUMBER type variable
21. 14. 6. NATURAL value Computation
21. 14. 7. Assigning a Fraction to an Integer
21. 14. 8. Setting Precision and Scale
21. 14. 9. NUMBER(1,-2): Variable with a scale of -2 can only hold values like 100,200,300... up to 900.
21. 14. 10. NUMBER Data type: integer, fixed point and floating point
21. 14. 11. Select a number value from a table into a variable and output it
21. 14. 12. IF statement with number value check
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