CREATE PROCEDURE
语句来创建新的存储过程,或使用 ALTER PROCEDURE
语句来更新已有的存储过程。create_index_if_not_exists
的存储过程,用于在表users
的列name
上创建索引:,,``sql,DELIMITER //,CREATE PROCEDURE create_index_if_not_exists(),BEGIN, DECLARE indexExists INT DEFAULT 0;,, SELECT COUNT(*) INTO indexExists FROM information_schema.statistics, WHERE table_schema = DATABASE() AND table_name = 'users' AND index_name = 'name_index';,, IF indexExists = 0 THEN, CREATE INDEX name_index ON users (name);, END IF;,END//,DELIMITER ;,
`,,以上存储过程首先检查
users表中是否存在名为
name_index`的索引,如果不存在则创建该索引。bash,#!/bin/bash,# 定义变量,BACKUP_DIR="/backup/mysql",MYSQL_USER="root",MYSQL_PASSWORD="yourpassword",DATABASE_NAME="yourdatabase",DATE=$(date +%Y%m%d%H%M),,# 创建备份目录,mkdir -p $BACKUP_DIR,,# 执行备份,mysqldump -u$MYSQL_USER -p$MYSQL_PASSWORD $DATABASE_NAME > $BACKUP_DIR/$DATABASE_NAME-$DATE.sql,,# 检查备份是否成功,if [ $? -eq 0 ]; then, echo "Backup successful: $BACKUP_DIR/$DATABASE_NAME-$DATE.sql",else, echo "Backup failed",fi,
`,,请根据实际情况修改
MYSQL_USER、
MYSQL_PASSWORD 和
DATABASE_NAME`。Powered By Z-BlogPHP 1.7.3