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Oracle PL/SQL/Numeric Math Functions/least - История изменений
2026-04-04T17:59:57Z
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в 13:45, 26 мая 2010
2010-05-26T13:45:19Z
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Admin: 1 версия
2010-05-26T09:55:10Z
<p>1 версия</p>
<p><b>Новая страница</b></p><div>==select least( "A", "B", "C" ) from dual;==<br />
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<!-- start source code --><br />
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<source lang="sql"><br />
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SQL><br />
SQL> select least( "A", "B", "C" ) from dual;<br />
L<br />
-<br />
A<br />
1 row selected.<br />
SQL><br />
SQL> --<br />
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</source><br />
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==select least( "X", "x" ) from dual;==<br />
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<!-- start source code --><br />
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<source lang="sql"><br />
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SQL><br />
SQL><br />
SQL> select least( "X", "x" ) from dual;<br />
L<br />
-<br />
X<br />
1 row selected.<br />
SQL><br />
SQL> --<br />
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</source><br />
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==This script demonstrates the Least functions==<br />
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<!-- start source code --><br />
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<source lang="sql"><br />
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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><br />
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</source><br />
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==Use least() to limit the value==<br />
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<!-- start source code --><br />
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<source lang="sql"><br />
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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.<br />
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</source></div>
Admin