写一个orcle可重复执行创建序列脚本

Sure, here is an example Oracle script for creating a sequence that can be executed repeatedly:

CREATE SEQUENCE my_sequence
START WITH 1
INCREMENT BY 1
MAXVALUE 1000
CYCLE
CACHE 20;

This script creates a sequence called "my_sequence" that starts at 1 and increments by 1 each time it is called. The maximum value is set to 1000 and the sequence will cycle back to the start value once it reaches the maximum. The CACHE parameter is set to 20, which means that the sequence will cache 20 values in memory to improve performance.

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写一个oracle备份脚本

以下是一个简单的 Oracle 数据库备份脚本，可以备份指定的数据库到本地磁盘或网络共享：

#!/bin/sh

# 设置备份目录和日志文件
backup_dir="/path/to/backup"
log_file="$backup_dir/backup.log"

# 设置 Oracle 环境变量
export ORACLE_HOME=/u01/app/oracle/product/12.1.0/dbhome_1
export PATH=$ORACLE_HOME/bin:$PATH

# 设置 Oracle SID 和用户名密码
ORACLE_SID="YOUR_ORACLE_SID"
username="YOUR_USERNAME"
password="YOUR_PASSWORD"

# 设置备份文件名和日期格式
backup_file="$backup_dir/${ORACLE_SID}_$(date +%Y%m%d%H%M%S).dmp"
date_format="+%Y-%m-%d %H:%M:%S"

# 创建备份目录和日志文件
mkdir -p $backup_dir
touch $log_file

# 输出备份开始的时间戳
echo "$(date $date_format) - Backup started" >> $log_file

# 执行备份命令
exp $username/$password@$ORACLE_SID file=$backup_file log=$log_file

# 输出备份结束的时间戳
echo "$(date $date_format) - Backup completed" >> $log_file

请注意，此脚本仅备份数据库的数据部分，不包括日志和其他元数据。如果需要完整备份，请使用 Oracle RMAN 工具。此外，还应该将备份文件定期复制到安全的地方，以防止意外数据损坏或丢失。

写一个oracle巡检脚本

对于Oracle数据库巡检，可以采用以下脚本进行检查：

#!/bin/bash
# Oracle database health check script

# Set variables
ORACLE_HOME=/u01/app/oracle/product/12.1.0/dbhome_1
ORACLE_SID=orcl
export ORACLE_HOME ORACLE_SID PATH
LOG_FILE=/var/log/oracle_health_check.log
echo "Starting Oracle health check at `date`" > $LOG_FILE

# Check if database is running
echo "Checking if database is running..." >> $LOG_FILE
ps -ef | grep pmon | grep -v grep > /dev/null
if [ $? -eq 0 ]; then
    echo "Database is running." >> $LOG_FILE
else
    echo "Database is not running." >> $LOG_FILE
    exit 1
fi

# Check database uptime
echo "Checking database uptime..." >> $LOG_FILE
sqlplus -s /nolog << EOF >> $LOG_FILE
conn / as sysdba
set pagesize 0 feedback off verify off heading off echo off
SELECT to_char(startup_time,'YYYY-MM-DD HH24:MI:SS') "UP_TIME" FROM v\$instance;
EOF

# Check database size
echo "Checking database size..." >> $LOG_FILE
sqlplus -s /nolog << EOF >> $LOG_FILE
conn / as sysdba
set pagesize 0 feedback off verify off heading off echo off
SELECT sum(bytes)/1024/1024/1024 as "DATABASE_SIZE_GB" FROM dba_data_files;
EOF

# Check tablespace usage
echo "Checking tablespace usage..." >> $LOG_FILE
sqlplus -s /nolog << EOF >> $LOG_FILE
conn / as sysdba
set pagesize 1000
col "TABLESPACE_NAME" for a20
col "USED_MB" for 99,999
col "FREE_MB" for 99,999
col "TOTAL_MB" for 99,999
SELECT tablespace_name "TABLESPACE_NAME",
ROUND((total.used_space / 1024 / 1024), 2) "USED_MB",
ROUND((total.free_space / 1024 / 1024), 2) "FREE_MB",
ROUND(((total.used_space + total.free_space) / 1024 / 1024), 2) "TOTAL_MB",
ROUND((total.used_space / total.total_space) * 100, 2) "PCT_USED"
FROM (SELECT tablespace_name,
SUM(bytes) free_space,
0 used_space,
SUM(bytes) total_space
FROM dba_free_space
GROUP BY tablespace_name
UNION ALL
SELECT tablespace_name,
0 free_space,
SUM(bytes) used_space,
SUM(bytes) total_space
FROM dba_data_files
GROUP BY tablespace_name) total
ORDER BY 5 DESC;
EOF

echo "Oracle health check completed at `date`" >> $LOG_FILE

这个脚本主要做了以下检查：

- 检查数据库是否运行
- 检查数据库运行时间
- 检查数据库大小
- 检查表空间使用情况

你可以将脚本中的变量和路径根据你的Oracle数据库实例进行修改，然后将脚本保存为.sh文件，然后直接在终端运行即可。