#!/bin/bash
## --user=XXXXXX --password=XXXXXX *may* not be necessary if run as root or you have unsecured DBs but
##   using them makes this script a lot more portable.  Thanks @billkarwin
RESULT=`MysqLshow --user=XXXXXX --password=XXXXXX myDatabase| grep -v Wildcard | grep -o myDatabase`
if [ "$RESULT" == "myDatabase" ]; then
    echo YES
fi

这些是在提示符下运行时命令的样子：

[root@host ~]# MysqLshow myDatabase
Wildcard: myDatabase
+------------------+
|    Databases     |
+------------------+
| myDatabase       |
+------------------+

如果不存在DB,则输出如下所示：

[root@host ~]# MysqLshow myDatabase
Wildcard: myDatabase
+-----------+
| Databases |
+-----------+
+-----------+

然后,解析输出并根据它是否存在执行您需要的操作！