i have a list of files that contains some PC hostname, then i need to enumerate every hostname and check if there's a table with same name of the hosts in MySQL database XYZ.
I need this because have to decide automatically if i have to make a create table or a insert into an existent table.
Database XYZ is composed by a table for every hostname i have (inventory purposes), now i have a scheduled task that creates a inventory text file and put it in a directory. Let's go back to first phrases of this post, i wish to feed a list of inventory files into another file then compare entries from that file with a ls (or similar) of sql directory.
I know for sure that for every old hostname there's a table named like the hostname but in the script that execute the sql code i need to create a new table in case of new hostname that make himself the inventory, so...
Eg.
I have a file named "hostnames" which contain:
Code:
pc001
pc002
pc005
...
And a directory "sqldir" which contains sql tables of the machines:
Now... Have anybody optimal way or suggests to read the file "hostnames" and then compare every hostname with the list of the directory "sqldir" and set a variable to make possible decide if it's the time to create a new table or append a existent one?
P.S. I have already the statement to create a new one or append, need only to put the right value for the variable which decide "right" or "left"...
Sorry if i have written too much but i'm not very confident in US/english and i fear to going misunderstood... Thx
Last edited by maxlamax; 02-15-2010 at 12:48 PM..
Reason: errors
Hi, iam learning MySql. Iam trieing to create a table in the database "guestbook"
at the command line in mysql heres what i type but i get a error
mysql>create table guestbook
->(
-> name varchar(40) null.
-> url varchar(40) null.
-> comments ... (3 Replies)
Hi all,
My problem: I want to connect to a remote computer (in the same office as me) which is running a mySQL server, access a specific table and update it, beofre disconnecting from the server. Is this possible? If so, any links/tutorials which might be of use?
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(sorry for my english)
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I need to compare the 2 mysql database tables. there are around 50 tables in each DB.
my idea is
in DB1
extract result select * from table1; to alog file1
in DB2
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now compare log file 1 file 2
pls help me out ...
thanks in advance (5 Replies)
i have a table
records
------------
id | user | time | event
91 admin | 12:00 | hi
92 admin | 11:00 | hi
93 admin | 12:00 | bye
94 admin | 13:00 | bye
95 root | 12:00 | hi
96 root | 12:30 | hi
97 root | 12:56 | hi
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I feel stupid for asking this because it seems that MYSQL code isn't working the way that I think it should work.
Basically I wrote code like this:
select * from `Test_DC_Trailer` HAVING max(DR_RefKey);
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Discussion started by: Astrocloud
7 Replies
LEARN ABOUT LINUX
ndb_delete_all
NDB_DELETE_ALL(1) MySQL Database System NDB_DELETE_ALL(1)NAME
ndb_delete_all - delete all rows from an NDB table
SYNOPSIS
ndb_delete_all options
DESCRIPTION
ndb_delete_all deletes all rows from the given NDB table. In some cases, this can be much faster than DELETE or even TRUNCATE TABLE.
Usage
ndb_delete_all -c connect_string tbl_name -d db_name
This deletes all rows from the table named tbl_name in the database named db_name. It is exactly equivalent to executing TRUNCATE
db_name.tbl_name in MySQL.
The following table includes options that are specific to ndb_delete_all. Additional descriptions follow the table. For options common to
most MySQL Cluster programs (including ndb_delete_all), see Options Common to MySQL Cluster Programs(1).
Table 17.16. ndb_delete_all Options and Variables: MySQL Cluster NDB 7.2
+--------------------------+-----------------------------------+-------------------------------------+
|Format | Description | Added / Removed |
+--------------------------+-----------------------------------+-------------------------------------+
| | Name of the database in which the | |
| --database=dbname, | table is found | All MySQL 5.5 based releases |
| | | |
| -d | | |
+--------------------------+-----------------------------------+-------------------------------------+
| | Perform the delete in a single | |
| --transactional, | transaction (may run out of | All MySQL 5.5 based releases |
| | operations) | |
| -t | | |
+--------------------------+-----------------------------------+-------------------------------------+
| | Run tup scan | |
| --tupscan | | All MySQL 5.5 based releases |
+--------------------------+-----------------------------------+-------------------------------------+
| | Run disk scan | |
| --diskscan | | All MySQL 5.5 based releases |
+--------------------------+-----------------------------------+-------------------------------------+
o --transactional, -t
Use of this option causes the delete operation to be performed as a single transaction.
Warning
With very large tables, using this option may cause the number of operations available to the cluster to be exceeded.
COPYRIGHT
Copyright (C) 1997, 2014, Oracle and/or its affiliates. All rights reserved.
This documentation is free software; you can redistribute it and/or modify it only under the terms of the GNU General Public License as
published by the Free Software Foundation; version 2 of the License.
This documentation is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with the program; if not, write to the Free Software Foundation,
Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or see http://www.gnu.org/licenses/.
SEE ALSO
For more information, please refer to the MySQL Reference Manual, which may already be installed locally and which is also available online
at http://dev.mysql.com/doc/.
AUTHOR
Oracle Corporation (http://dev.mysql.com/).
MySQL 5.5 01/30/2014 NDB_DELETE_ALL(1)
02-15-2010
