Function of command cat while intalling

[nastweb]

Dear All,

I just know command "cat" is for see content of file.

What is function of below commands while installing zabbix

shell> cat mysql.sql | mysql -u<username> -p<password> zabbix
shell> cat data.sql | mysql -u<username> -p<password> zabbix
shell> cat images_mysql.sql | mysql -u<username> -p<password> zabbix

While I execute the commands on terminal, Is it normaly if I got below :

nast@nast:~/Webroot/zabbix-1.6/create/data$ cat images_mysql.sql | mysql -u root -p password zabbix
mysql Ver 14.12 Distrib 5.0.51b, for pc-linux-gnu (i686) using EditLine wrapper
Copyright (C) 2002 MySQL AB
This software comes with ABSOLUTELY NO WARRANTY. This is free software,
and you are welcome to modify and redistribute it under the GPL license
Usage: mysql [OPTIONS] [database]
-?, --help Display this help and exit.
-I, --help Synonym for -?
--auto-rehash Enable automatic rehashing. One doesn't need to use
'rehash' to get table and field completion, but startup
and reconnecting may take a longer time. Disable with
--disable-auto-rehash.
....
....
....
....

Variables (--variable-name=value)
and boolean options {FALSE|TRUE} Value (after reading options)
--------------------------------- -----------------------------
auto-rehash FALSE
character-sets-dir (No default value)
default-character-set latin1
compress FALSE
database (No default value)
delimiter ;
vertical FALSE
force FALSE
named-commands FALSE
local-infile FALSE
no-beep FALSE
host (No default value)
html FALSE
xml FALSE
line-numbers TRUE
unbuffered FALSE
column-names TRUE
sigint-ignore FALSE
port 3306
prompt mysql>
quick FALSE
raw FALSE
reconnect FALSE
socket /opt/lampp/var/mysql/mysql.sock
ssl FALSE
ssl-ca (No default value)
ssl-capath (No default value)
ssl-cert (No default value)
ssl-cipher (No default value)
ssl-key (No default value)
ssl-verify-server-cert FALSE
table FALSE
debug-info FALSE
user root
safe-updates FALSE
i-am-a-dummy FALSE
connect_timeout 0
max_allowed_packet 16777216
net_buffer_length 16384
select_limit 1000
max_join_size 1000000
secure-auth FALSE
show-warnings FALSE

Thanks,
NS