oracle字典表
下列数据字典视图提供表和表的列的信息：
. DBA_TABLES
. DBA_ALL_TABLES
. USER_TABLES
. USER_ALL_TABLES
. ALL_TABLES (所有的表)
. ALL_ALL_TABLES
. DBA_TAB_COLUMNS
. USER_TAB_COLUMNS
. ALL_TAB_COLUMNS (表中所有的列)
1 /*显示当前用户*/ 2 show user 3 在sql plus中可用，在pl sql中不可用 4 5 /*查看所有用户名*/ 6 select username,user_id,created from all_users; 7 8 /*查看当前用户的用户详情*/ 9 select username,user_id,account_status,lock_date,expiry_date,default_tablespace,temporary_tablespace,created,initial_rsrc_consumer_group,external_name from user_users; 10 11 /*查看数据库的版本*/ 12 select product,version,status from product_component_version; 13 14 /*查看当前用户的用户权限，系统权限和表级权限*/ 15 select username,granted_role,admin_option,default_role,os_granted from user_role_privs; 16 select username,privilege,admin_option from user_sys_privs; 17 select grantee,owner,table_name,grantor,priviege,granttable,hierarchy from user_tab_privs; 18 19 查看当前用户的缺省表空间 20 SQL>select username,default_tablespace from user_users; 21 查看当前用户的角色 22 SQL>select * from user_role_privs; 23 24 查看当前用户的系统权限和表级权限 25 SQL>select * from user_sys_privs; 26 SQL>select * from user_tab_privs; 27 28 查看用户下所有的表 29 SQL>select * from user_tables; 30 31 显示用户信息(所属表空间) 32 select default_tablespace,temporary_tablespace 33 from dba_users where username='GAME'; 34 35 1、用户 36 37 查看当前用户的缺省表空间 38 SQL>select username,default_tablespace from user_users; 39 40 查看当前用户的角色 41 SQL>select * from user_role_privs; 42 43 查看当前用户的系统权限和表级权限 44 SQL>select * from user_sys_privs; 45 SQL>select * from user_tab_privs; 46 47 显示当前会话所具有的权限 48 SQL>select * from session_privs; 49 50 显示指定用户所具有的系统权限 51 SQL>select * from dba_sys_privs where grantee='GAME'; 52 53 显示特权用户 54 select * from v$pwfile_users; 55 56 显示用户信息(所属表空间) 57 select default_tablespace,temporary_tablespace 58 from dba_users where username='GAME'; 59 60 显示用户的PROFILE 61 select profile from dba_users where username='GAME'; 62 63 64 2、表 65 66 查看用户下所有的表 67 SQL>select * from user_tables; 68 69 查看名称包含log字符的表 70 SQL>select object_name,object_id from user_objects 71 where instr(object_name,'LOG')>0; 72 73 查看某表的创建时间 74 SQL>select object_name,created from user_objects where object_name=upper('&table_name'); 75 76 查看某表的大小 77 SQL>select sum(bytes)/(1024*1024) as "size(M)" from user_segments 78 where segment_name=upper('&table_name'); 79 80 查看放在Oracle的内存区里的表 81 SQL>select table_name,cache from user_tables where instr(cache,'Y')>0; 82 83 3、索引 84 85 查看索引个数和类别 86 SQL>select index_name,index_type,table_name from user_indexes order by table_name; 87 88 查看索引被索引的字段 89 SQL>select * from user_ind_columns where index_name=upper('&index_name'); 90 91 查看索引的大小 92 SQL>select sum(bytes)/(1024*1024) as "size(M)" from user_segments 93 where segment_name=upper('&index_name'); 94 95 4、序列号 96 97 查看序列号，last_number是当前值 98 SQL>select * from user_sequences; 99 100 5、视图 101 102 查看视图的名称 103 SQL>select view_name from user_views; 104 105 查看创建视图的select语句 106 SQL>set view_name,text_length from user_views; 107 SQL>set long 2000; 说明：可以根据视图的text_length值设定set long 的大小 108 SQL>select text from user_views where view_name=upper('&view_name'); 109 110 6、同义词 111 112 查看同义词的名称 113 SQL>select * from user_synonyms; 114 115 7、约束条件 116 117 查看某表的约束条件 118 SQL>select constraint_name, constraint_type,search_condition, r_constraint_name 119 from user_constraints where table_name = upper('&table_name'); 120 121 SQL>select c.constraint_name,c.constraint_type,cc.column_name 122 from user_constraints c,user_cons_columns cc 123 where c.owner = upper('&table_owner') and c.table_name = upper('&table_name') 124 and c.owner = cc.owner and c.constraint_name = cc.constraint_name 125 order by cc.position; 126 127 8、存储函数和过程 128 129 查看函数和过程的状态 130 SQL>select object_name,status from user_objects where object_type='FUNCTION'; 131 SQL>select object_name,status from user_objects where object_type='PROCEDURE'; 132 133 查看函数和过程的源代码 134 SQL>select text from all_source where owner=user and name=upper('&plsql_name');
