Considerations For Between; Examples Of Between; Comparison Predicates - HP Neoview SQL Reference Manual

Considerations for BETWEEN

Logical Equivalents Using AND and OR
The predicate expr1 BETWEEN expr2 AND expr3 is true if and only if this condition is true:
expr2 <= expr1 AND expr1 <= expr3
The predicate expr1 NOT BETWEEN expr2 AND expr3 is true if and only if this condition
is true:
expr2 > expr1 OR expr1 > expr3
Descending Columns in Keys
If a clause specifies a column in a key BETWEEN expr2 and expr3, expr3 must be greater
than expr2 even if the column is specified as DESCENDING within its table definition.

Examples of BETWEEN

• This predicate is true if the total price of the units in inventory is in the range from $1,000
to $10,000:
qty_on_hand * price
BETWEEN 1000.00 AND 10000.00
• This predicate is true if the part cost is less than $5 or more than $800:
partcost NOT BETWEEN 5.00 AND 800.00
• This BETWEEN predicate selects the part number 6400:
SELECT * FROM partsupp
WHERE partnum BETWEEN 6400 AND 6700
AND partcost > 300.00 SERIALIZABLE ACCESS;
Part/Num
--------
6400
6401
6401
--- 3 row(s) selected.
• Find names between Jody Selby and Gene Wright:
(last_name, first_name) BETWEEN
('SELBY', 'JODY') AND ('WRIGHT', 'GENE')
The name Barbara Swift would meet the criteria; the name Mike Wright would not.
SELECT empnum, first_name, last_name
FROM persnl.employee
WHERE (last_name, first_name) BETWEEN
('SELBY', 'JODY') AND ('WRIGHT', 'GENE');
EMPNUM
------
43
72
74
...
--- 15 row(s) selected.

Comparison Predicates

• "Considerations for Comparison Predicates"
• "Examples of Comparison Predicates"
A comparison predicate compares the values of sequences of expressions, or the values of
sequences of row values that are the result of row subqueries.
234 SQL Language Elements
Supp/Num Part/Cost
-------- ------------
1
2
3
FIRST_NAME LAST_NAME
--------------- --------------------
PAUL WINTER
GLENN THOMAS
JOHN WALKER
Qty/Rec
----------
390.00 50
500.00 20
480.00 38