mysql表名长度

sonyet

了解一下,并学习一下...
http://www.mysqlinfo.com/2011/11/08/%E6%B5%8B%E8%AF%95mysql%E6%95%B0%E6%8D%AE%E5%BA%93%E5%BA%93%E5%90%8D%E5%92%8C%E8%A1%A8%E5%90%8D%E6%9C%80%E5%A4%A7%E5%85%81%E8%AE%B8%E9%95%BF%E5%BA%A6/

#!/bin/bash
# made by zhoubo
# counter_dbname_long.sh
mysql=`which mysql`
counter=0
a="b"
$mysql -Ne "create database t_"$a
while [ $? -eq 0 ]
do
a=$a"b"
(( counter++ ))
mysql -Ne "create database t_"$a &>/dev/null
done
expr  $counter + 2
mysql -A -Bse "show databases;" ¦ grep t_b* ¦xargs -t -I '{}' mysql -e "drop database "{}";" &> /dev/null
19:04 [iyunv@192.168.1.12]$ sh counter_dbname_long.sh
64
#!/bin/bash
# made by zhoubo
# counter_tbname_long.sh
mysql=`which mysql`
counter=0
a="b"
$mysql -Ne "use test;create table t_"$a" (id int(1));"
while [ $? -eq 0 ]
do
a=$a"b"
(( counter++ ))
$mysql -Ne "use test;create table t_"$a" (id int(1));" 2>/dev/null
done
expr $counter + 2
mysql -A -Bse "use test;show tables" ¦ grep t_b* ¦xargs -t -I '{}' mysql -A -Bse  "use test;drop table "{}";" &> /dev/null


19:04 [iyunv@192.168.1.12]$ sh counter_tbname_long.sh
64