Oracle PL/SQL/System Tables Views/user indexes — различия между версиями
Admin (обсуждение | вклад) м (1 версия) |
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(нет различий)
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Версия 13:45, 26 мая 2010
Check query in user_indexes after creation
SQL>
SQL> create table emp(
2 emp_id integer primary key
3 ,lastname varchar2(20) not null
4 ,firstname varchar2(15) not null
5 ,midinit varchar2(1)
6 ,street varchar2(30)
7 ,city varchar2(20)
8 ,state varchar2(2)
9 ,zip varchar2(5)
10 ,shortZipCode varchar2(4)
11 ,area_code varchar2(3)
12 ,phone varchar2(8)
13 ,company_name varchar2(50));
Table created.
SQL>
SQL>
SQL> create index emp_2_idx_phone on emp (phone);
Index created.
SQL>
SQL> select index_name, table_name, uniqueness
2 from user_indexes
3 where index_name = "EMP_2_IDX_PHONE";
SQL>
SQL> drop table emp;
Table dropped.
SQL>
Did the command create index statistics?
SQL>
SQL> SELECT index_name
2 FROM user_indexes
3 WHERE last_analyzed IS NULL;
INDEX_NAME
------------------------------
SYS_C004799
SYS_C008156
HD_CLUSTER_INDEX
3 rows selected.