Question

我们公司的数据库有一个名为＆＃34; TEMP_EMP_ATTENDANCE＆＃34;的表格。它这次有大约600000条记录，而且系统每天为员工出勤记录增加约3500条记录。因此，当我们进行考勤计算过程时，整个数据库以及应用程序变得太慢，每个班次大约需要2.5到3小时。我们可以做些什么来加快处理速度？

表说明：

CREATE TABLE SYSTEM.TEMP_EMP_ATTENDANCE (
  CM_CODE NUMBER(2, 0) NOT NULL,
  EAE_MONTH NUMBER(2, 0) NOT NULL,
  EAE_YEAR NUMBER(4, 0) NOT NULL,
  EAE_EM_ID NUMBER(8, 0) NOT NULL,
  EAE_EMP_ID VARCHAR2(50 BYTE),
  EAE_REG_NO VARCHAR2(6 BYTE),
  EM_NAME VARCHAR2(100 BYTE),
  EAE_DATE TIMESTAMP(6) NOT NULL,
  EM_TYPE_CODE NUMBER(4, 0),
  EG_ID NUMBER(4, 0),
  PH_CODE NUMBER(4, 0),
  DEPT_CODE NUMBER(4, 0),
  SUBDEPT_CODE NUMBER(4, 0),
  SHIFT_ID NUMBER(4, 0),
  SCH_INTIME TIMESTAMP(6),
  SCH_OUTTIME TIMESTAMP(6),
  IN_TIME TIMESTAMP(6),
  OUT_TIME TIMESTAMP(6),
  DAY NUMBER(5, 2),
  LATE_TIME NUMBER(15, 2),
  OVER_TIME NUMBER(15, 2),
  EAE_EM_RESTDAY VARCHAR2(10 BYTE),
  DAILY_STATUS VARCHAR2(30 BYTE),
  LTM_CODE NUMBER(4, 0),
  BMANUALUPDATEINOUTTIME NUMBER(1, 0),
  TOTAL_PUNCH NUMBER(3, 0),
  REMARK VARCHAR2(1000 BYTE),REMARK VARCHAR2(1000 BYTE),
  WORK_HOURS NUMBER(4, 2),REMARK VARCHAR2(1000 BYTE),
  WORK_HOURS NUMBER(4, 2),
  ENT_DATE DATE,REMARK VARCHAR2(1000 BYTE),
  WORK_HOURS NUMBER(4, 2),
  ENT_DATE DATE,
  USER_ID NUMBER(8, 0),REMARK VARCHAR2(1000 BYTE),
  WORK_HOURS NUMBER(4, 2),
  ENT_DATE DATE,
  USER_ID NUMBER(8, 0),
  DM_ID NUMBER(4, 0),REMARK VARCHAR2(1000 BYTE),
  WORK_HOURS NUMBER(4, 2),
  ENT_DATE DATE,
  USER_ID NUMBER(8, 0),
  DM_ID NUMBER(4, 0),
  LATE_GOING NUMBER(15, 2),REMARK VARCHAR2(1000 BYTE),
  WORK_HOURS NUMBER(4, 2),
  ENT_DATE DATE,
  USER_ID NUMBER(8, 0),
  DM_ID NUMBER(4, 0),
  LATE_GOING NUMBER(15, 2),
  DAY_STATUS VARCHAR2(1 BYTE),REMARK VARCHAR2(1000 BYTE),
  WORK_HOURS NUMBER(4, 2),
  ENT_DATE DATE,
  USER_ID NUMBER(8, 0),
  DM_ID NUMBER(4, 0),
  LATE_GOING NUMBER(15, 2),
  DAY_STATUS VARCHAR2(1 BYTE),
  CONSTRAINT TEMP_EMP_ATTENDANCE_O_PK PRIMARY KEY (CM_CODE, EAE_EM_ID, EAE_DATE, EAE_MONTH, EAE_YEAR) USING INDEX TABLESPACE SYSTEM STORAGE ( INITIAL 64K MAXEXTENTS UNLIMITED ))REMARK VARCHAR2(1000 BYTE),
  WORK_HOURS NUMBER(4, 2),
  ENT_DATE DATE,
  USER_ID NUMBER(8, 0),
  DM_ID NUMBER(4, 0),
  LATE_GOING NUMBER(15, 2),
  DAY_STATUS VARCHAR2(1 BYTE),
  CONSTRAINT TEMP_EMP_ATTENDANCE_O_PK PRIMARY KEY (CM_CODE, EAE_EM_ID, EAE_DATE, EAE_MONTH, EAE_YEAR) USING INDEX TABLESPACE SYSTEM STORAGE ( INITIAL 64K MAXEXTENTS UNLIMITED ))
TABLESPACE SYSTEMREMARK VARCHAR2(1000 BYTE),
  WORK_HOURS NUMBER(4, 2),
  ENT_DATE DATE,
  USER_ID NUMBER(8, 0),
  DM_ID NUMBER(4, 0),
  LATE_GOING NUMBER(15, 2),
  DAY_STATUS VARCHAR2(1 BYTE),
  CONSTRAINT TEMP_EMP_ATTENDANCE_O_PK PRIMARY KEY (CM_CODE, EAE_EM_ID, EAE_DATE, EAE_MONTH, EAE_YEAR) USING INDEX TABLESPACE SYSTEM STORAGE ( INITIAL 64K MAXEXTENTS UNLIMITED ))
TABLESPACE SYSTEM
STORAGE (REMARK VARCHAR2(1000 BYTE),
  WORK_HOURS NUMBER(4, 2),
  ENT_DATE DATE,
  USER_ID NUMBER(8, 0),
  DM_ID NUMBER(4, 0),
  LATE_GOING NUMBER(15, 2),
  DAY_STATUS VARCHAR2(1 BYTE),
  CONSTRAINT TEMP_EMP_ATTENDANCE_O_PK PRIMARY KEY (CM_CODE, EAE_EM_ID, EAE_DATE, EAE_MONTH, EAE_YEAR) USING INDEX TABLESPACE SYSTEM STORAGE ( INITIAL 64K MAXEXTENTS UNLIMITED ))
TABLESPACE SYSTEM
STORAGE (
  INITIAL 64KREMARK VARCHAR2(1000 BYTE),
  WORK_HOURS NUMBER(4, 2),
  ENT_DATE DATE,
  USER_ID NUMBER(8, 0),
  DM_ID NUMBER(4, 0),
  LATE_GOING NUMBER(15, 2),
  DAY_STATUS VARCHAR2(1 BYTE),
  CONSTRAINT TEMP_EMP_ATTENDANCE_O_PK PRIMARY KEY (CM_CODE, EAE_EM_ID, EAE_DATE, EAE_MONTH, EAE_YEAR) USING INDEX TABLESPACE SYSTEM STORAGE ( INITIAL 64K MAXEXTENTS UNLIMITED ))
TABLESPACE SYSTEM
STORAGE (
  INITIAL 64K
  MAXEXTENTS UNLIMITEDREMARK VARCHAR2(1000 BYTE),
  WORK_HOURS NUMBER(4, 2),
  ENT_DATE DATE,
  USER_ID NUMBER(8, 0),
  DM_ID NUMBER(4, 0),
  LATE_GOING NUMBER(15, 2),
  DAY_STATUS VARCHAR2(1 BYTE),
  CONSTRAINT TEMP_EMP_ATTENDANCE_O_PK PRIMARY KEY (CM_CODE, EAE_EM_ID, EAE_DATE, EAE_MONTH, EAE_YEAR) USING INDEX TABLESPACE SYSTEM STORAGE ( INITIAL 64K MAXEXTENTS UNLIMITED ))
TABLESPACE SYSTEM
STORAGE (
  INITIAL 64K
  MAXEXTENTS UNLIMITED
)REMARK VARCHAR2(1000 BYTE),
  WORK_HOURS NUMBER(4, 2),
  ENT_DATE DATE,
  USER_ID NUMBER(8, 0),
  DM_ID NUMBER(4, 0),
  LATE_GOING NUMBER(15, 2),
  DAY_STATUS VARCHAR2(1 BYTE),
  CONSTRAINT TEMP_EMP_ATTENDANCE_O_PK PRIMARY KEY (CM_CODE, EAE_EM_ID, EAE_DATE, EAE_MONTH, EAE_YEAR) USING INDEX TABLESPACE SYSTEM STORAGE ( INITIAL 64K MAXEXTENTS UNLIMITED ))
TABLESPACE SYSTEM
STORAGE (
  INITIAL 64K
  MAXEXTENTS UNLIMITED
)
LOGGING;REMARK VARCHAR2(1000 BYTE),
  WORK_HOURS NUMBER(4, 2),
  ENT_DATE DATE,
  USER_ID NUMBER(8, 0),
  DM_ID NUMBER(4, 0),
  LATE_GOING NUMBER(15, 2),
  DAY_STATUS VARCHAR2(1 BYTE),
  CONSTRAINT TEMP_EMP_ATTENDANCE_O_PK PRIMARY KEY (CM_CODE, EAE_EM_ID, EAE_DATE, EAE_MONTH, EAE_YEAR) USING INDEX TABLESPACE SYSTEM STORAGE ( INITIAL 64K MAXEXTENTS UNLIMITED ))
TABLESPACE SYSTEM
STORAGE (
  INITIAL 64K
  MAXEXTENTS UNLIMITED
)
LOGGING;

CREATE INDEX SYSTEM.IND_TEMP_DAILY2_O ON SYSTEM.TEMP_EMP_ATTENDANCE (CM_CODE, EAE_EM_ID, EAE_DATE, EM_TYPE_CODE, EG_ID, DEPT_CODE)REMARK VARCHAR2(1000 BYTE),
  WORK_HOURS NUMBER(4, 2),
  ENT_DATE DATE,
  USER_ID NUMBER(8, 0),
  DM_ID NUMBER(4, 0),
  LATE_GOING NUMBER(15, 2),
  DAY_STATUS VARCHAR2(1 BYTE),
  CONSTRAINT TEMP_EMP_ATTENDANCE_O_PK PRIMARY KEY (CM_CODE, EAE_EM_ID, EAE_DATE, EAE_MONTH, EAE_YEAR) USING INDEX TABLESPACE SYSTEM STORAGE ( INITIAL 64K MAXEXTENTS UNLIMITED ))
TABLESPACE SYSTEM
STORAGE (
  INITIAL 64K
  MAXEXTENTS UNLIMITED
)
LOGGING;

CREATE INDEX SYSTEM.IND_TEMP_DAILY2_O ON SYSTEM.TEMP_EMP_ATTENDANCE (CM_CODE, EAE_EM_ID, EAE_DATE, EM_TYPE_CODE, EG_ID, DEPT_CODE)
TABLESPACE SYSTEMREMARK VARCHAR2(1000 BYTE),
  WORK_HOURS NUMBER(4, 2),
  ENT_DATE DATE,
  USER_ID NUMBER(8, 0),
  DM_ID NUMBER(4, 0),
  LATE_GOING NUMBER(15, 2),
  DAY_STATUS VARCHAR2(1 BYTE),
  CONSTRAINT TEMP_EMP_ATTENDANCE_O_PK PRIMARY KEY (CM_CODE, EAE_EM_ID, EAE_DATE, EAE_MONTH, EAE_YEAR) USING INDEX TABLESPACE SYSTEM STORAGE ( INITIAL 64K MAXEXTENTS UNLIMITED ))
TABLESPACE SYSTEM
STORAGE (
  INITIAL 64K
  MAXEXTENTS UNLIMITED
)
LOGGING;

CREATE INDEX SYSTEM.IND_TEMP_DAILY2_O ON SYSTEM.TEMP_EMP_ATTENDANCE (CM_CODE, EAE_EM_ID, EAE_DATE, EM_TYPE_CODE, EG_ID, DEPT_CODE)
TABLESPACE SYSTEM
STORAGE (REMARK VARCHAR2(1000 BYTE),
  WORK_HOURS NUMBER(4, 2),
  ENT_DATE DATE,
  USER_ID NUMBER(8, 0),
  DM_ID NUMBER(4, 0),
  LATE_GOING NUMBER(15, 2),
  DAY_STATUS VARCHAR2(1 BYTE),
  CONSTRAINT TEMP_EMP_ATTENDANCE_O_PK PRIMARY KEY (CM_CODE, EAE_EM_ID, EAE_DATE, EAE_MONTH, EAE_YEAR) USING INDEX TABLESPACE SYSTEM STORAGE ( INITIAL 64K MAXEXTENTS UNLIMITED ))
TABLESPACE SYSTEM
STORAGE (
  INITIAL 64K
  MAXEXTENTS UNLIMITED
)
LOGGING;

CREATE INDEX SYSTEM.IND_TEMP_DAILY2_O ON SYSTEM.TEMP_EMP_ATTENDANCE (CM_CODE, EAE_EM_ID, EAE_DATE, EM_TYPE_CODE, EG_ID, DEPT_CODE)
TABLESPACE SYSTEM
STORAGE (
  INITIAL 64KREMARK VARCHAR2(1000 BYTE),
  WORK_HOURS NUMBER(4, 2),
  ENT_DATE DATE,
  USER_ID NUMBER(8, 0),
  DM_ID NUMBER(4, 0),
  LATE_GOING NUMBER(15, 2),
  DAY_STATUS VARCHAR2(1 BYTE),
  CONSTRAINT TEMP_EMP_ATTENDANCE_O_PK PRIMARY KEY (CM_CODE, EAE_EM_ID, EAE_DATE, EAE_MONTH, EAE_YEAR) USING INDEX TABLESPACE SYSTEM STORAGE ( INITIAL 64K MAXEXTENTS UNLIMITED ))
TABLESPACE SYSTEM
STORAGE (
  INITIAL 64K
  MAXEXTENTS UNLIMITED
)
LOGGING;

CREATE INDEX SYSTEM.IND_TEMP_DAILY2_O ON SYSTEM.TEMP_EMP_ATTENDANCE (CM_CODE, EAE_EM_ID, EAE_DATE, EM_TYPE_CODE, EG_ID, DEPT_CODE)
TABLESPACE SYSTEM
STORAGE (
  INITIAL 64K
  MAXEXTENTS UNLIMITEDREMARK VARCHAR2(1000 BYTE),
  WORK_HOURS NUMBER(4, 2),
  ENT_DATE DATE,
  USER_ID NUMBER(8, 0),
  DM_ID NUMBER(4, 0),
  LATE_GOING NUMBER(15, 2),
  DAY_STATUS VARCHAR2(1 BYTE),
  CONSTRAINT TEMP_EMP_ATTENDANCE_O_PK PRIMARY KEY (CM_CODE, EAE_EM_ID, EAE_DATE, EAE_MONTH, EAE_YEAR) USING INDEX TABLESPACE SYSTEM STORAGE ( INITIAL 64K MAXEXTENTS UNLIMITED ))
TABLESPACE SYSTEM
STORAGE (
  INITIAL 64K
  MAXEXTENTS UNLIMITED
)
LOGGING;

CREATE INDEX SYSTEM.IND_TEMP_DAILY2_O ON SYSTEM.TEMP_EMP_ATTENDANCE (CM_CODE, EAE_EM_ID, EAE_DATE, EM_TYPE_CODE, EG_ID, DEPT_CODE)
TABLESPACE SYSTEM
STORAGE (
  INITIAL 64K
  MAXEXTENTS UNLIMITED
)REMARK VARCHAR2(1000 BYTE),
  WORK_HOURS NUMBER(4, 2),
  ENT_DATE DATE,
  USER_ID NUMBER(8, 0),
  DM_ID NUMBER(4, 0),
  LATE_GOING NUMBER(15, 2),
  DAY_STATUS VARCHAR2(1 BYTE),
  CONSTRAINT TEMP_EMP_ATTENDANCE_O_PK PRIMARY KEY (CM_CODE, EAE_EM_ID, EAE_DATE, EAE_MONTH, EAE_YEAR) USING INDEX TABLESPACE SYSTEM STORAGE ( INITIAL 64K MAXEXTENTS UNLIMITED ))
TABLESPACE SYSTEM
STORAGE (
  INITIAL 64K
  MAXEXTENTS UNLIMITED
)
LOGGING;

CREATE INDEX SYSTEM.IND_TEMP_DAILY2_O ON SYSTEM.TEMP_EMP_ATTENDANCE (CM_CODE, EAE_EM_ID, EAE_DATE, EM_TYPE_CODE, EG_ID, DEPT_CODE)
TABLESPACE SYSTEM
STORAGE (
  INITIAL 64K
  MAXEXTENTS UNLIMITED
)
LOGGING;REMARK VARCHAR2(1000 BYTE),
  WORK_HOURS NUMBER(4, 2),
  ENT_DATE DATE,
  USER_ID NUMBER(8, 0),
  DM_ID NUMBER(4, 0),
  LATE_GOING NUMBER(15, 2),
  DAY_STATUS VARCHAR2(1 BYTE),
  CONSTRAINT TEMP_EMP_ATTENDANCE_O_PK PRIMARY KEY (CM_CODE, EAE_EM_ID, EAE_DATE, EAE_MONTH, EAE_YEAR) USING INDEX TABLESPACE SYSTEM STORAGE ( INITIAL 64K MAXEXTENTS UNLIMITED ))
TABLESPACE SYSTEM
STORAGE (
  INITIAL 64K
  MAXEXTENTS UNLIMITED
)
LOGGING;

CREATE INDEX SYSTEM.IND_TEMP_DAILY2_O ON SYSTEM.TEMP_EMP_ATTENDANCE (CM_CODE, EAE_EM_ID, EAE_DATE, EM_TYPE_CODE, EG_ID, DEPT_CODE)
TABLESPACE SYSTEM
STORAGE (
  INITIAL 64K
  MAXEXTENTS UNLIMITED
)
LOGGING;

CREATE UNIQUE INDEX SYSTEM.IND_TEMP_DAILY_O ON SYSTEM.TEMP_EMP_ATTENDANCE (EAE_EM_ID, CM_CODE, EAE_DATE)REMARK VARCHAR2(1000 BYTE),
  WORK_HOURS NUMBER(4, 2),
  ENT_DATE DATE,
  USER_ID NUMBER(8, 0),
  DM_ID NUMBER(4, 0),
  LATE_GOING NUMBER(15, 2),
  DAY_STATUS VARCHAR2(1 BYTE),
  CONSTRAINT TEMP_EMP_ATTENDANCE_O_PK PRIMARY KEY (CM_CODE, EAE_EM_ID, EAE_DATE, EAE_MONTH, EAE_YEAR) USING INDEX TABLESPACE SYSTEM STORAGE ( INITIAL 64K MAXEXTENTS UNLIMITED ))
TABLESPACE SYSTEM
STORAGE (
  INITIAL 64K
  MAXEXTENTS UNLIMITED
)
LOGGING;

CREATE INDEX SYSTEM.IND_TEMP_DAILY2_O ON SYSTEM.TEMP_EMP_ATTENDANCE (CM_CODE, EAE_EM_ID, EAE_DATE, EM_TYPE_CODE, EG_ID, DEPT_CODE)
TABLESPACE SYSTEM
STORAGE (
  INITIAL 64K
  MAXEXTENTS UNLIMITED
)
LOGGING;

CREATE UNIQUE INDEX SYSTEM.IND_TEMP_DAILY_O ON SYSTEM.TEMP_EMP_ATTENDANCE (EAE_EM_ID, CM_CODE, EAE_DATE)
TABLESPACE SYSTEMREMARK VARCHAR2(1000 BYTE),
  WORK_HOURS NUMBER(4, 2),
  ENT_DATE DATE,
  USER_ID NUMBER(8, 0),
  DM_ID NUMBER(4, 0),
  LATE_GOING NUMBER(15, 2),
  DAY_STATUS VARCHAR2(1 BYTE),
  CONSTRAINT TEMP_EMP_ATTENDANCE_O_PK PRIMARY KEY (CM_CODE, EAE_EM_ID, EAE_DATE, EAE_MONTH, EAE_YEAR) USING INDEX TABLESPACE SYSTEM STORAGE ( INITIAL 64K MAXEXTENTS UNLIMITED ))
TABLESPACE SYSTEM
STORAGE (
  INITIAL 64K
  MAXEXTENTS UNLIMITED
)
LOGGING;

CREATE INDEX SYSTEM.IND_TEMP_DAILY2_O ON SYSTEM.TEMP_EMP_ATTENDANCE (CM_CODE, EAE_EM_ID, EAE_DATE, EM_TYPE_CODE, EG_ID, DEPT_CODE)
TABLESPACE SYSTEM
STORAGE (
  INITIAL 64K
  MAXEXTENTS UNLIMITED
)
LOGGING;

CREATE UNIQUE INDEX SYSTEM.IND_TEMP_DAILY_O ON SYSTEM.TEMP_EMP_ATTENDANCE (EAE_EM_ID, CM_CODE, EAE_DATE)
TABLESPACE SYSTEM
STORAGE (REMARK VARCHAR2(1000 BYTE),
  WORK_HOURS NUMBER(4, 2),
  ENT_DATE DATE,
  USER_ID NUMBER(8, 0),
  DM_ID NUMBER(4, 0),
  LATE_GOING NUMBER(15, 2),
  DAY_STATUS VARCHAR2(1 BYTE),
  CONSTRAINT TEMP_EMP_ATTENDANCE_O_PK PRIMARY KEY (CM_CODE, EAE_EM_ID, EAE_DATE, EAE_MONTH, EAE_YEAR) USING INDEX TABLESPACE SYSTEM STORAGE ( INITIAL 64K MAXEXTENTS UNLIMITED ))
TABLESPACE SYSTEM
STORAGE (
  INITIAL 64K
  MAXEXTENTS UNLIMITED
)
LOGGING;

CREATE INDEX SYSTEM.IND_TEMP_DAILY2_O ON SYSTEM.TEMP_EMP_ATTENDANCE (CM_CODE, EAE_EM_ID, EAE_DATE, EM_TYPE_CODE, EG_ID, DEPT_CODE)
TABLESPACE SYSTEM
STORAGE (
  INITIAL 64K
  MAXEXTENTS UNLIMITED
)
LOGGING;

CREATE UNIQUE INDEX SYSTEM.IND_TEMP_DAILY_O ON SYSTEM.TEMP_EMP_ATTENDANCE (EAE_EM_ID, CM_CODE, EAE_DATE)
TABLESPACE SYSTEM
STORAGE (
  INITIAL 64KREMARK VARCHAR2(1000 BYTE),
  WORK_HOURS NUMBER(4, 2),
  ENT_DATE DATE,
  USER_ID NUMBER(8, 0),
  DM_ID NUMBER(4, 0),
  LATE_GOING NUMBER(15, 2),
  DAY_STATUS VARCHAR2(1 BYTE),
  CONSTRAINT TEMP_EMP_ATTENDANCE_O_PK PRIMARY KEY (CM_CODE, EAE_EM_ID, EAE_DATE, EAE_MONTH, EAE_YEAR) USING INDEX TABLESPACE SYSTEM STORAGE ( INITIAL 64K MAXEXTENTS UNLIMITED ))
TABLESPACE SYSTEM
STORAGE (
  INITIAL 64K
  MAXEXTENTS UNLIMITED
)
LOGGING;

CREATE INDEX SYSTEM.IND_TEMP_DAILY2_O ON SYSTEM.TEMP_EMP_ATTENDANCE (CM_CODE, EAE_EM_ID, EAE_DATE, EM_TYPE_CODE, EG_ID, DEPT_CODE)
TABLESPACE SYSTEM
STORAGE (
  INITIAL 64K
  MAXEXTENTS UNLIMITED
)
LOGGING;

CREATE UNIQUE INDEX SYSTEM.IND_TEMP_DAILY_O ON SYSTEM.TEMP_EMP_ATTENDANCE (EAE_EM_ID, CM_CODE, EAE_DATE)
TABLESPACE SYSTEM
STORAGE (
  INITIAL 64K
  MAXEXTENTS UNLIMITEDREMARK VARCHAR2(1000 BYTE),
  WORK_HOURS NUMBER(4, 2),
  ENT_DATE DATE,
  USER_ID NUMBER(8, 0),
  DM_ID NUMBER(4, 0),
  LATE_GOING NUMBER(15, 2),
  DAY_STATUS VARCHAR2(1 BYTE),
  CONSTRAINT TEMP_EMP_ATTENDANCE_O_PK PRIMARY KEY (CM_CODE, EAE_EM_ID, EAE_DATE, EAE_MONTH, EAE_YEAR) USING INDEX TABLESPACE SYSTEM STORAGE ( INITIAL 64K MAXEXTENTS UNLIMITED ))
TABLESPACE SYSTEM
STORAGE (
  INITIAL 64K
  MAXEXTENTS UNLIMITED
)
LOGGING;

CREATE INDEX SYSTEM.IND_TEMP_DAILY2_O ON SYSTEM.TEMP_EMP_ATTENDANCE (CM_CODE, EAE_EM_ID, EAE_DATE, EM_TYPE_CODE, EG_ID, DEPT_CODE)
TABLESPACE SYSTEM
STORAGE (
  INITIAL 64K
  MAXEXTENTS UNLIMITED
)
LOGGING;

CREATE UNIQUE INDEX SYSTEM.IND_TEMP_DAILY_O ON SYSTEM.TEMP_EMP_ATTENDANCE (EAE_EM_ID, CM_CODE, EAE_DATE)
TABLESPACE SYSTEM
STORAGE (
  INITIAL 64K
  MAXEXTENTS UNLIMITED
)REMARK VARCHAR2(1000 BYTE),
  WORK_HOURS NUMBER(4, 2),
  ENT_DATE DATE,
  USER_ID NUMBER(8, 0),
  DM_ID NUMBER(4, 0),
  LATE_GOING NUMBER(15, 2),
  DAY_STATUS VARCHAR2(1 BYTE),
  CONSTRAINT TEMP_EMP_ATTENDANCE_O_PK PRIMARY KEY (CM_CODE, EAE_EM_ID, EAE_DATE, EAE_MONTH, EAE_YEAR) USING INDEX TABLESPACE SYSTEM STORAGE ( INITIAL 64K MAXEXTENTS UNLIMITED ))
TABLESPACE SYSTEM
STORAGE (
  INITIAL 64K
  MAXEXTENTS UNLIMITED
)
LOGGING;

CREATE INDEX SYSTEM.IND_TEMP_DAILY2_O ON SYSTEM.TEMP_EMP_ATTENDANCE (CM_CODE, EAE_EM_ID, EAE_DATE, EM_TYPE_CODE, EG_ID, DEPT_CODE)
TABLESPACE SYSTEM
STORAGE (
  INITIAL 64K
  MAXEXTENTS UNLIMITED
)
LOGGING;

CREATE UNIQUE INDEX SYSTEM.IND_TEMP_DAILY_O ON SYSTEM.TEMP_EMP_ATTENDANCE (EAE_EM_ID, CM_CODE, EAE_DATE)
TABLESPACE SYSTEM
STORAGE (
  INITIAL 64K
  MAXEXTENTS UNLIMITED
)
LOGGING;

Answer 1

首先，使用“SYSTEM”用户帐户来设置用户数据并在SYSTEM表空间上创建表是一个糟糕的设计。您应该有另一个用户应该在不同的表空间上拥有您的对象。您不应该在“SYSTEM TABLESPACE”上保留任何用户数据。

现在要快速执行查询，需要考虑几个参数。

首先：

检查您是否更新了表和索引的统计信息。如果您的统计数据是陈旧的，那么这可能是主要原因，因此更新表格中的统计数据。如果统计数据不是陈旧的，那么请检查此表的last_analyzed。如果自上次分析后该表中的数据变化超过~10％，则收集统计数据。
检查该表上是否有高碎片。如果是，那么考虑重建它。
如果您的表格规模非常大，请尝试在该表格上实施分区概念。
在报表运行时检查操作系统资源利用率。你有足够的RAM，CPU来满足你的查询需求。（free -m，vmstat 1 10，iostat -c 1 10）
AWR报告最好分析您的数据库发生了什么。当您开始生成报告记录时，然后一旦完成，请记下停机时间并生成AWR报告。如果持续时间超过1小时，则生成AWR 1小时间隔。您可以轻松找出数据库发生的情况。

这些是任何人都可以遵循的通用方法。仍然有很多参数可以从AWR报告中获取。

更新特定表时，ORACLE db变得非常慢

1 个答案: