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ÐÞ¸ÄOracleµÄ½ø³ÌÊý[processes]¼°»á»°Êý[sessions]
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OracleµÄsessionsºÍprocessesµÄ¹ØÏµÊÇ
         sessions=1.1*processes + 5
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SQL> show parameter processes;
NAME                                 TYPE        VALUE
------------------------------------ ----------- ---------------------------------------
aq_tm_processes                      integer     1
db_writer_processes                  integer     1
job_queue_processes                  integer     10
log_archive_max_processes            integer     1
processes                            integer     150
SQL> alter system set processes=400 scope = spfile;
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SQL> show parameter processes;
NAME                                 TYPE        VALUE
------------------------------------ ----------- -----------------------------------------
aq_tm_processes                    &n


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ALTER TABLE SCHEMA.PREFIX_INFO ADD (
CONSTRAINT PK_PREFIX_INFO PRIMARY KEY (INFO_ID));
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alter table schema.prefix_info add constraint prefix_info_pkey primary key(info_id);
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create table emp1
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select * from emp where deptno = 20;
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update emp1
set sal = sal + 100,
comm = nvl(comm,0) + 50
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