I have a working SQL-Query here, in which I'm using subqueries to get the needed result.
The idea behind this, is to get a list of networks which have 2 tags set in the database. Because of the way it is stored, i get a tuple for each Tag, so I get a duplicate of all networks.
The Tables and the query:
The result without the subqueries:
Subqueries are evil in terms of performance. The last time I worked with this, I wrapped it in some lines of code and sorted out the duplicates.
I'm wondering if there's not a more clever alternative in plain SQL, which is not such a performance killer than the subqueries.
I have a script that looks for all jobs that contain a particular calendar.
Some of the calendars have '&' in them and sql freaks out when it encounters that.. is there a way around this?
I have tried:
select job_name from job where run_calendar='1&15dom'
select job_name from job... (3 Replies)
Hi ...
I am doing a switch user and then rsh and then running a sql query .
I am successfull in rsh and logging into the database , but my query doesnt run ..
Here's the command :
su - linus -c "rsh -l linus psmf ORACLE_SID=SMP;export ORACLE_SID;sqlplus... (1 Reply)
Hello Everyone,
I am looking to write a script that will run on many machines in a network at the same time. They need to write a result to a common location. I plan to use a SQLlite database as this common writing point. But the concern I have is how SQLlite will react to multiple writes that... (1 Reply)
Hi,
I am passing an argument for the script and that argument values should exist in database.
bill_period_input="'""$1""'"
bill_period=`sqlplus uname/pwd@dbname <<eof!
set verify off
set heading off
set feedback off
select bill_period from bill_period_ref where... (4 Replies)
Hi ,
I used the below script to get the sql data into csv file using unix scripting.
I m getting the output into an output file but the output file is not displayed in a separe columns .
#!/bin/ksh
export FILE_PATH=/maav/home/xyz/abc/
rm $FILE_PATH/sample.csv
sqlplus -s... (2 Replies)
Hi Everyone,
Can anyone pls help me out......with my requirement, i am struggling since 3 days. Please find the requirement below
my file contains below data
R1|Array/Network Resistor - VIP|V_RES_CLASS|V_MOUNT_FEATURE|SURFACE MOUNT|AND|8533.10.00.20|8533.10.00.20|
R1|Array/Network Resistor... (9 Replies)
I used the following code
code
select * from tablename where columnname
Instead of printing the expected output it prints all the files in the present directory since there is a "*" in the code. Is there any way to overcome the problem?
Thanks
Ananth (2 Replies)
Hi, this's Pom. I'm quite a new one for shell script but I have to do sql on shell script to query some information from database.
I found a concern to get a new line...When I run my script, it retrieves all data as wondering but it's shown in one line :(
What should I do? I'm not sure that... (2 Replies)
Hi All ,
I have tried many times am getting syntax error on 'UNION'
can anybody tell me ...
INSERT INTO table1
(
Type
, num_items
, num_letters
, total_value
)
(select
type='1',
num_items,
num_letters=count(*),
total_value=sum(letter_value)
from
table2
where
num_items = 1 (1 Reply)
Hello All,
I hope I'm posting this in the right section.
I have zero sql query writing skill, in fact, I've never done it before, but for some reason, a request came across my desk to get information from one of our databases. I have about 200 ticket numbers that have no information attached,... (8 Replies)
Discussion started by: bbbngowc
8 Replies
LEARN ABOUT DEBIAN
class::dbi::query
Class::DBI::Query(3pm) User Contributed Perl Documentation Class::DBI::Query(3pm)NAME
Class::DBI::Query - Deprecated SQL manager for Class::DBI
SYNOPSIS
my $sth = Class::DBI::Query
->new({
owner => $class,
sqlname => $type,
essential => @columns,
where_columns => @where_cols,
})
->run($val);
DESCRIPTION
This abstracts away many of the details of the Class::DBI underlying SQL mechanism. For the most part you probably don't want to be
interfacing directly with this.
The underlying mechanisms are not yet stable, and are subject to change at any time.
OPTIONS
A Query can have many options set before executing. Most can either be passed as an option to new(), or set later if you are building the
query up dynamically:
owner
The Class::DBI subclass that 'owns' this query. In the vast majority of cases a query will return objects - the owner is the class of which
instances will be returned.
sqlname
This should be the name of a query set up using set_sql.
where_clause
This is the raw SQL that will substituted into the 'WHERE %s' in your query. If you have multiple %s's in your query then you should supply
a listref of where_clauses. This SQL can include placeholders, which will be used when you call run().
essential
When retrieving rows from the database that match the WHERE clause of the query, these are the columns that we fetch back and pre-load the
resulting objects with. By default this is the Essential column group of the owner class.
METHODS
where()
$query->where($match, @columns);
This will extend your 'WHERE' clause by adding a 'AND $column = ?' (or whatever $match is, isntead of "=") for each column passed. If you
have multiple WHERE clauses this will extend the last one.
perl v5.12.4 2004-04-25 Class::DBI::Query(3pm)