测试ORACLE中表最多可以有多少列
SQL> drop table t;
表已删除。
SQL> create table t (a number);
表已创建。
SQL> set serverout on
SQL> begin
2 for i in 1..1000000 loop
3 execute immediate 'alter table t add( col'|| i || ' number)' ;
4
5
6 end loop;
7
8 exception when others then
9
10 dbms_output.put_line(to_char(sqlcode)||sqlerrm);
11
12 end;
13 /
-1792ORA-01792: 表或视图中的最大列数为 1000
PL/SQL 过程已成功完成。
SQL> select * from v$version;
BANNER
----------------------------------------------------------------
Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Prod
PL/SQL Release 10.2.0.1.0 - Production
CORE 10.2.0.1.0 Production
TNS for 32-bit Windows: Version 10.2.0.1.0 - Production
NLSRTL Version 10.2.0.1.0 - Production
SQL> desc t
名称 是否为空? 类型
----------------------------------------- -------- ----------------------------
A NUMBER
COL1 NUMBER
COL2 NUMBER
COL3 NUMBER
COL4 NUMBER
COL5 NUMBER
COL6 NUMBER
COL7 NUMBER
COL8 NUMBER
COL9 NUMBER
COL10 NUMBER
COL11 NUMBER
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SQL> spool off
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