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Oracle foundation and system table
2022-07-06 14:48:00 【CS gun King】
1)oracle Startup sequence
start-up :
(1) Sign in ORACLE user , Start listening
lsnrctl start
(2) Log in to the database , And start the (mount ,oppen( example ))
sqlplus as sysdba
start
2) System table view
user_tables; // Table owned by current user
all_tables; // All users' tables
dba_tables; // Including system tables
Corresponding table fields :
user_tab_columns ;
all_tab_columns ;
dba_tab_columns;
Table annotation :
user_tab_comments;
dba_tab_comments;
all_tab_comments;
Comment on the field
user_col_comments;
dba_col_comments;
all_col_comments;
Table space :
user_tablespaces;
Program processing :
all_source;
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