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Oracle PL/SQL Tutorial/Numerical Math Functions/TANH - История изменений
2026-04-04T11:48:35Z
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в 13:45, 26 мая 2010
2010-05-26T13:45:46Z
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Admin: 1 версия
2010-05-26T10:08:51Z
<p>1 версия</p>
<p><b>Новая страница</b></p><div>== select tanh(0.5)==<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="sql"><br />
SQL><br />
SQL><br />
SQL><br />
SQL> select tanh(0.5)<br />
2 from dual;<br />
TANH(0.5)<br />
----------<br />
.462117157<br />
SQL><br />
SQL></source><br />
<br />
<br />
<br />
== TANH(1)==<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="sql"><br />
SQL> select TANH(1) from dual;<br />
TANH(1)<br />
----------<br />
.761594156</source><br />
<br />
<br />
<br />
== Using the TANH function to find the hyperbolic tangent of 30 degrees==<br />
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<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="sql"><br />
SQL><br />
SQL><br />
SQL> -- create demo table<br />
SQL> create table myTable(<br />
2 value1 NUMBER(3),<br />
3 value2 NUMBER(3),<br />
4 value3 NUMBER(3)<br />
5 )<br />
6 /<br />
Table created.<br />
SQL><br />
SQL> -- prepare data<br />
SQL> insert into myTable(value1,value2, value3) values (30,60,90)<br />
2 /<br />
1 row created.<br />
SQL> select * from myTable<br />
2 /<br />
VALUE1 VALUE2 VALUE3<br />
---------- ---------- ----------<br />
30 60 90<br />
SQL><br />
SQL> SELECT TANH(value1*2*3.1416/360)FROM myTable<br />
2 /<br />
TANH(VALUE1*2*3.1416/360)<br />
-------------------------<br />
.48047372<br />
SQL><br />
SQL> -- clean the table<br />
SQL> drop table myTable<br />
2 /<br />
Table dropped.<br />
SQL></source></div>
Admin