mysql> select 8 from a
    -> where 1=1
    ->  and 1=0
    -> p
select 8 from a
where 1=1
 and 1=0
    -> c


提示符 含义
mysql> 准备好接受新命令。
-> 等待多行命令的下一行。
‘> 等待下一行,等待以单引号(“’”)开始的字符串的结束。
“> 等待下一行,等待以双引号(“””)开始的字符串的结束。
`> 等待下一行,等待以反斜点(‘`’)开始的识别符的结束。
/*> 等待下一行,等待以/*开始的注释的结束。

mysql help列表

?         (?) Synonym for `help'.
clear     (c) Clear the current input statement.
connect   (r) Reconnect to the server. Optional arguments are db and host.
delimiter (d) Set statement delimiter.
ego       (G) Send command to mysql server, display result vertically.
exit      (q) Exit mysql. Same as quit.
go        (g) Send command to mysql server.
help      (h) Display this help.
notee     (t) Don't write into outfile.
print     (p) Print current command.
prompt    (R) Change your mysql prompt.
quit      (q) Quit mysql.
rehash    (#) Rebuild completion hash.
source    (.) Execute an SQL script file. Takes a file name as an argument.
status    (s) Get status information from the server.
tee       (T) Set outfile [to_outfile]. Append everything into given outfile.
use       (u) Use another database. Takes database name as argument.
charset   (C) Switch to another charset. Might be needed for processing binlog
with multi-byte charsets.
warnings  (W) Show warnings after every statement.
nowarning (w) Don't show warnings after every statement.