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Oracle PL/SQL Tutorial/Miscellaneous Functions/LEAST - История изменений
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в 13:45, 26 мая 2010
2010-05-26T13:45:46Z
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Admin: 1 версия
2010-05-26T10:06:35Z
<p>1 версия</p>
<p><b>Новая страница</b></p><div>== select least(12*6,148/2,73)==<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="sql"><br />
SQL><br />
SQL><br />
SQL> select least (12*6,148/2,73)<br />
2 from dual;<br />
LEAST(12*6,148/2,73)<br />
--------------------<br />
72<br />
SQL></source><br />
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== This script demonstrates the Least functions==<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="sql"><br />
SQL> SET SERVEROUTPUT ON<br />
SQL> DECLARE<br />
2 v_char VARCHAR2(10);<br />
3 v_number NUMBER(10);<br />
4 BEGIN<br />
5<br />
6<br />
7 v_char := LEAST("A", "B", "C");<br />
8 v_number := LEAST(1,2,3);<br />
9<br />
10 DBMS_OUTPUT.PUT_LINE("Least Character: "||v_char);<br />
11 DBMS_OUTPUT.PUT_LINE("Least Number: "||v_number);<br />
12<br />
13 END;<br />
14 /<br />
Least Character: A<br />
Least Number: 1<br />
PL/SQL procedure successfully completed.<br />
SQL><br />
SQL></source><br />
<br />
<br />
<br />
== Use least() to limit the value==<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="sql"><br />
SQL> create table salary<br />
2 ( grade NUMBER(2) constraint S_PK primary key<br />
3 , lowerlimit NUMBER(6,2)<br />
4 , upperlimit NUMBER(6,2)<br />
5 , bonus NUMBER(6,2)<br />
6 , constraint S_LO_UP_CHK check(lowerlimit <= upperlimit)<br />
7 ) ;<br />
Table created.<br />
SQL><br />
SQL> insert into salary values (1, 700,1200, 0);<br />
1 row created.<br />
SQL> insert into salary values (2, 1201,1400, 50);<br />
1 row created.<br />
SQL> insert into salary values (3, 1401,2000, 100);<br />
1 row created.<br />
SQL> insert into salary values (4, 2001,3000, 200);<br />
1 row created.<br />
SQL> insert into salary values (5, 3001,9999, 500);<br />
1 row created.<br />
SQL><br />
SQL> select grade + 5<br />
2 , lowerlimit + 2300<br />
3 , least(9999,upperlimit + 2300)<br />
4 , 500<br />
5 from salary;<br />
GRADE+5 LOWERLIMIT+2300 LEAST(9999,UPPERLIMIT+2300) 500<br />
---------- --------------- --------------------------- ----------<br />
6 3000 3500 500<br />
7 3501 3700 500<br />
8 3701 4300 500<br />
9 4301 5300 500<br />
10 5301 9999 500<br />
SQL><br />
SQL><br />
SQL> drop table salary;<br />
Table dropped.</source><br />
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<br />
<br />
== Use the Least functions==<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="sql"><br />
SQL><br />
SQL><br />
SQL> SET SERVEROUTPUT ON<br />
SQL> DECLARE<br />
2 v_char VARCHAR2(10);<br />
3 v_number NUMBER(10);<br />
4 BEGIN<br />
5<br />
6 v_char := LEAST("A", "B", "C");<br />
7 v_number := LEAST(1,2,3);<br />
8<br />
9 DBMS_OUTPUT.PUT_LINE("Least Character: "||v_char);<br />
10 DBMS_OUTPUT.PUT_LINE("Least Number: "||v_number);<br />
11<br />
12<br />
13 END;<br />
14 /<br />
Least Character: A<br />
Least Number: 1<br />
PL/SQL procedure successfully completed.</source></div>
Admin