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Oracle PL/SQL Tutorial/Large Objects/LONG - История изменений
2026-04-06T13:43:05Z
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в 13:45, 26 мая 2010
2010-05-26T13:45:46Z
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Admin: 1 версия
2010-05-26T10:08:59Z
<p>1 версия</p>
<p><b>Новая страница</b></p><div>== Copying LONG to LOB with the ALTER TABLE...MODIFY statement==<br />
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<!-- start source code --><br />
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<source lang="sql"><br />
SQL> CREATE TABLE myLongTable1 (id NUMBER,long_data LONG);<br />
Table created.<br />
SQL><br />
SQL> INSERT INTO myLongTable1 VALUES (100,RPAD("A",200000,"A"));<br />
1 row created.<br />
SQL><br />
SQL> ALTER TABLE myLongTable1 MODIFY (long_data CLOB);<br />
Table altered.<br />
SQL><br />
SQL> drop table myLongTable1;<br />
Table dropped.</source><br />
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== Long raw type column==<br />
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<!-- start source code --><br />
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<source lang="sql"><br />
SQL> CREATE TABLE myTable (<br />
2 id INTEGER PRIMARY KEY,<br />
3 long_raw_column LONG RAW NOT NULL<br />
4 );<br />
Table created.<br />
SQL><br />
SQL> drop table myTable;<br />
Table dropped.</source><br />
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== long type column==<br />
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<!-- start source code --><br />
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<source lang="sql"><br />
SQL><br />
SQL> CREATE TABLE myLongTable (id NUMBER,long_data LONG);<br />
Table created.<br />
SQL><br />
SQL> INSERT INTO myLongTable VALUES (100,RPAD("A",200000,"A"));<br />
1 row created.<br />
SQL><br />
SQL> drop table myLongTable;<br />
Table dropped.<br />
SQL></source><br />
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== Long type column, not null==<br />
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<!-- start source code --><br />
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<source lang="sql"><br />
SQL> CREATE TABLE myTable (<br />
2 id INTEGER PRIMARY KEY,<br />
3 long_column LONG NOT NULL<br />
4 );<br />
Table created.<br />
SQL><br />
SQL><br />
SQL> drop table myTable;<br />
Table dropped.</source></div>
Admin