select 'analyze table ' || table_name || ' compute statistics;' from user_tables where table_name like 'PR\_%\_%' escape '\' and tablespace_name = 'PR_DATA1'
2. 统计企业和产品总数
select (select sum(NUM_ROWS) from (select t.TABLE_NAME, t.NUM_ROWS from user_tables t where table_name like 'PR_%_SHOP')) as 商家, (select sum(NUM_ROWS) from (select t.TABLE_NAME, t.NUM_ROWS from user_tables t where table_name like 'PR_%_PRODUCT')) as 产品 from dual;
3. 统计表中的记录数
CREATE VIEW v_pr_sum as SELECT t.table_name as 表名, SUM(t.num_rows) as 记录数 FROM user_tables t WHERE (t.table_name LIKE 'PR\_%\_%' ESCAPE '\' and t.table_name not like '%_IMAGE') GROUP BY t.table_name ORDER BY t.table_name
4. 查看数据库当前会话和最大会话
select to_number(value) from V$parameter where name='processes' union select count(*) from V$process;
5. 建立数据库链路
create database link dl_temp connect to zq identified by zq using '(DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=TCP)(HOST=172.16.4.210)(PORT=1521)))(CONNECT_DATA=(SID=orcl)))'