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Oracle PL/SQL/PL SQL/Concatenation Operator - История изменений
2026-04-05T10:30:24Z
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в 13:45, 26 мая 2010
2010-05-26T13:45:19Z
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Admin: 1 версия
2010-05-26T09:59:02Z
<p>1 версия</p>
<p><b>Новая страница</b></p><div>==||: the concatenation operator==<br />
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<!-- start source code --><br />
<br />
<source lang="sql"><br />
<br />
SQL><br />
SQL> -- Use of the concatenation operator.<br />
SQL> SET SERVEROUTPUT ON<br />
SQL> DECLARE<br />
2 a VARCHAR2(30);<br />
3 b VARCHAR2(30);<br />
4 c VARCHAR2(30);<br />
5 BEGIN<br />
6 -- Concatenate several string constants.<br />
7 c := "A" || " AND " || "B";<br />
8 DBMS_OUTPUT.PUT_LINE(c);<br />
9 -- Concatenate both string variables and constants.<br />
10 a := "A";<br />
11 b := "B";<br />
12 DBMS_OUTPUT.PUT_LINE(a || " " || b || ",");<br />
13 -- Concatenate two string variables.<br />
14 a := "A ";<br />
15 b := "B";<br />
16 c := a || b;<br />
17 DBMS_OUTPUT.PUT_LINE(c);<br />
18 END;<br />
19 /<br />
A AND B<br />
A B,<br />
A B<br />
PL/SQL procedure successfully completed.<br />
SQL><br />
<br />
</source></div>
Admin