Sql 从Oracle表中删除数据_Sql_Oracle_Oracle11g

Sql 从Oracle表中删除数据

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Sql 从Oracle表中删除数据,sql,oracle,oracle11g,Sql,Oracle,Oracle11g,我想从用于存储数据的Oracle表中删除数据 -- TABLE AGENT_HISTORY CREATE TABLE AGENT_HISTORY( EVENT_ID INTEGER NOT NULL, AGENT_ID INTEGER NOT NULL, EVENT_DATE DATE NOT NULL ) / -- CREATE INDEXES FOR TABLE AGENT_HISTORY CREATE INDEX IX_RELATIONSHIP1 ON AGENT_H

我想从用于存储数据的Oracle表中删除数据

  -- TABLE AGENT_HISTORY

CREATE TABLE AGENT_HISTORY(
  EVENT_ID INTEGER NOT NULL,
  AGENT_ID INTEGER NOT NULL,
  EVENT_DATE DATE NOT NULL
)
/

-- CREATE INDEXES FOR TABLE AGENT_HISTORY

CREATE INDEX IX_RELATIONSHIP1 ON AGENT_HISTORY (AGENT_ID)
/

-- ADD KEYS FOR TABLE AGENT_HISTORY

ALTER TABLE AGENT_HISTORY ADD CONSTRAINT KEY8 PRIMARY KEY (EVENT_ID)
/

-- TABLE CPU_HISTORY

CREATE TABLE CPU_HISTORY(
  CPU_HISTORY_ID INTEGER NOT NULL,
  EVENT_ID INTEGER NOT NULL,
  CPU_NAME VARCHAR2(50 ) NOT NULL,
  CPU_VALUE NUMBER NOT NULL
)
/

-- CREATE INDEXES FOR TABLE CPU_HISTORY

CREATE INDEX IX_RELATIONSHIP5 ON CPU_HISTORY (EVENT_ID)
/

-- ADD KEYS FOR TABLE CPU_HISTORY

ALTER TABLE CPU_HISTORY ADD CONSTRAINT KEY9 PRIMARY KEY (CPU_HISTORY_ID)
/

-- TABLE CPU_TEMP_HISTORY

CREATE TABLE CPU_TEMP_HISTORY(
  CPU_TEMP_HISTORY_ID INTEGER NOT NULL,
  EVENT_ID INTEGER,
  CPU_TEMP_NAME VARCHAR2(50 ) NOT NULL,
  CPU_TEMP_VALUE NUMBER NOT NULL
)
/

-- CREATE INDEXES FOR TABLE CPU_TEMP_HISTORY

CREATE INDEX IX_RELATIONSHIP7 ON CPU_TEMP_HISTORY (EVENT_ID)
/

-- ADD KEYS FOR TABLE CPU_TEMP_HISTORY

ALTER TABLE CPU_TEMP_HISTORY ADD CONSTRAINT KEY10 PRIMARY KEY (CPU_TEMP_HISTORY_ID)
/

-- TABLE MEMORY_HISTORY

CREATE TABLE MEMORY_HISTORY(
  MEMORY_HISTORY_ID INTEGER NOT NULL,
  EVENT_ID INTEGER,
  MEMORY_NAME VARCHAR2(50 ) NOT NULL,
  MEMORY_VALUE NUMBER NOT NULL
)
/

-- CREATE INDEXES FOR TABLE MEMORY_HISTORY

CREATE INDEX IX_RELATIONSHIP9 ON MEMORY_HISTORY (EVENT_ID)
/

-- ADD KEYS FOR TABLE MEMORY_HISTORY

ALTER TABLE MEMORY_HISTORY ADD CONSTRAINT KEY11 PRIMARY KEY (MEMORY_HISTORY_ID)
/

-- TABLE DISK_HISTORY

CREATE TABLE DISK_HISTORY(
  DISK_HISTORY_ID INTEGER NOT NULL,
  EVENT_ID INTEGER,
  DISK_NAME VARCHAR2(50 ) NOT NULL,
  DISK_READ_VALUE NUMBER NOT NULL,
  DISK_WRITE_VALUE NUMBER
)
/

-- CREATE INDEXES FOR TABLE DISK_HISTORY

CREATE INDEX IX_RELATIONSHIP10 ON DISK_HISTORY (EVENT_ID)
/

-- ADD KEYS FOR TABLE DISK_HISTORY

ALTER TABLE DISK_HISTORY ADD CONSTRAINT KEY12 PRIMARY KEY (DISK_HISTORY_ID)
/

-- TABLE NETWORK_HISTORY

CREATE TABLE NETWORK_HISTORY(
  NETWORK_HISTORY_ID INTEGER NOT NULL,
  EVENT_ID INTEGER,
  ADAPTER_NAME VARCHAR2(50 ) NOT NULL,
  TRANSMITBYTES NUMBER NOT NULL,
  TRANSMITSPEED NUMBER,
  RECEIVESPEED NUMBER,
  RECEIVEBYTES NUMBER
)
/

-- CREATE INDEXES FOR TABLE NETWORK_HISTORY

CREATE INDEX IX_RELATIONSHIP11 ON NETWORK_HISTORY (EVENT_ID)
/

-- ADD KEYS FOR TABLE NETWORK_HISTORY

ALTER TABLE NETWORK_HISTORY ADD CONSTRAINT KEY13 PRIMARY KEY (NETWORK_HISTORY_ID)
/

-- TABLE SWAP_HISTORY

CREATE TABLE SWAP_HISTORY(
  SWAP_HISTORY_ID INTEGER NOT NULL,
  EVENT_ID INTEGER,
  SWAP_NAME VARCHAR2(50 ) NOT NULL,
  SWAP_VALUE NUMBER NOT NULL
)
/

-- CREATE INDEXES FOR TABLE SWAP_HISTORY

CREATE INDEX IX_RELATIONSHIP13 ON SWAP_HISTORY (EVENT_ID)
/

-- ADD KEYS FOR TABLE SWAP_HISTORY

ALTER TABLE SWAP_HISTORY ADD CONSTRAINT KEY14 PRIMARY KEY (SWAP_HISTORY_ID)
/

-- TABLE CONNECTIONS_HISTORY

CREATE TABLE CONNECTIONS_HISTORY(
  CONNECTIONS_HISTORY_ID INTEGER NOT NULL,
  EVENT_ID INTEGER,
  CONNECTIONS_NAME VARCHAR2(50 ) NOT NULL,
  CONNECTIONS_VALUE NUMBER NOT NULL
)
/

-- CREATE INDEXES FOR TABLE CONNECTIONS_HISTORY

CREATE INDEX IX_RELATIONSHIP14 ON CONNECTIONS_HISTORY (EVENT_ID)
/

-- ADD KEYS FOR TABLE CONNECTIONS_HISTORY

ALTER TABLE CONNECTIONS_HISTORY ADD CONSTRAINT KEY15 PRIMARY KEY (CONNECTIONS_HISTORY_ID)
/

-- TABLE PARTITIONS_HISTORY

CREATE TABLE PARTITIONS_HISTORY(
  PARTITIONS_HISTORY_ID INTEGER NOT NULL,
  EVENT_ID INTEGER,
  PARTITIONS_NAME VARCHAR2(50 ) NOT NULL,
  PARTITIONS_VALUE NUMBER NOT NULL
)
/

-- CREATE INDEXES FOR TABLE PARTITIONS_HISTORY

CREATE INDEX IX_RELATIONSHIP15 ON PARTITIONS_HISTORY (EVENT_ID)
/

-- ADD KEYS FOR TABLE PARTITIONS_HISTORY

ALTER TABLE PARTITIONS_HISTORY ADD CONSTRAINT KEY16 PRIMARY KEY (PARTITIONS_HISTORY_ID)
/

如何使用一个SQL查询从Oracle表中删除3个月以上的所有数据

我可以只使用一个SQL查询吗？可能使用级联删除？

实际上，您应该添加一个外键约束，当您删除子记录对应的父记录时，该约束将删除子记录：

ALTER TABLE CPU_HISTORY 
ADD CONSTRAINT FK_CPU_HIST_EVENT_ID
FOREIGN KEY (EVENT_ID)
     REFERENCES AGENT_HISTORY (EVENT_ID)
     ON DELETE CASCADE;

您将只执行上述语句一次

请注意，如果CPU_历史记录中的记录具有未知事件_ID（不在代理_历史记录中），则上述语句将失败。在这种情况下，首先清理这些孤儿记录

对具有引用代理历史的事件ID的所有表重复此操作。请注意，您需要使用唯一的名称命名所有这些外键

然后删除以下内容：

DELETE 
FROM    AGENT_HISTORY
WHERE   EVENT_DATE < ADD_MONTHS(SYSDATE, -3);

删除
从历史上看
其中事件日期<添加月份（系统日期，-3）；

…相应的记录（具有相同的事件ID）将从CPU历史记录（以及应用相同的

CASCADE DELETE

外键的其他表）中删除。

实际上，您应该添加外键约束，该约束将在删除子记录对应的父记录时删除子记录：

ALTER TABLE CPU_HISTORY 
ADD CONSTRAINT FK_CPU_HIST_EVENT_ID
FOREIGN KEY (EVENT_ID)
     REFERENCES AGENT_HISTORY (EVENT_ID)
     ON DELETE CASCADE;