I made a test table with a single varchar field and no index. I loaded it with 30,000 records and an additional 30 duplicate records. I ran the following queries.
My product have around 10-15 programs/services running in the sun box, which together completes a task, sequentially. Several instances of the each program/service are running in the unix box, to manage the load and for risk-management reasons. As of now, we dont follow a strict strategy in... (2 Replies)
I have some questions regarding disk perfomance, and what I can do to make it just a little (or much :)) more faster.
From what I've heard the first partitions will be faster than the later ones because tracks at the outer edges of a hard drive platter simply moves faster. But I've also read in... (4 Replies)
How would one go about optimizing this current .sh program so it works at a more minimal time. Such as is there a better way to count what I need than what I have done or better way to match patterns in the file? Thanks,
#declare variables to be used.
help=-1
count=0
JanCount=0
FebCount=0... (3 Replies)
Hi forum,
I'm administrating a workstation/server for my lab and I was wondering how to optimize OSX. I was wondering what unnecessary background tasks I could kick off the system so I free up as much memory and cpu power.
Other optimization tips are also welcome (HD parameters, memory... (2 Replies)
Hi,
I have two files in the format listed below. I need to find out all values from field 12 to field 20 present in file 2 and list them in file3(format as file2)
File1 :
FEIN,CHRISTA... (2 Replies)
Can this awk statement be optimized? i ask because log.txt is a giant file with several hundred thousands of lines of records.
myscript.sh:
while read line
do
searchterm="${1}"
datecurr=$(date +%s)
file=$(awk 'BEGIN{split(ARGV,var,",");print var}' $line)
... (3 Replies)
I have a huge log file close to 3GB in size.
My task is to generate some reporting based on # of times something is being logged.
I need to find the number of time StringA , StringB , StringC is being called separately.
What I am doing right now is:
grep "StringA" server.log | wc -l... (4 Replies)
Hello,
I'm looking for advice on how to optimize this bash script, currently i use the shotgun approach to avoid file io/buffering problems of forks trying to write simultaneously to the same file. i'd like to keep this as a fairly portable bash script rather than writing a C routine.
in a... (8 Replies)
now, i have to search for a pattern within a particular time frame which the user will provide in the following format:
19/Jun/2018:07:04,21/Jun/2018:21:30
it is easy to get tempted to attempt this search with a variation of the following awk command:
awk... (3 Replies)
Yes.
Got few suggestions.
- How about minifying resources
- mod_expires
- Service workers setup
https://www.unix.com/attachments/web-programming/7709d1550557731-sneak-preview-new-unix-com-usercp-vuejs-demo-screenshot-png (8 Replies)
Discussion started by: Akshay Hegde
8 Replies
LEARN ABOUT REDHAT
select_into
SELECT INTO(7) SQL Commands SELECT INTO(7)NAME
SELECT INTO - create a new table from the results of a query
SYNOPSIS
SELECT [ ALL | DISTINCT [ ON ( expression [, ...] ) ] ]
* | expression [ AS output_name ] [, ...]
INTO [ TEMPORARY | TEMP ] [ TABLE ] new_table
[ FROM from_item [, ...] ]
[ WHERE condition ]
[ GROUP BY expression [, ...] ]
[ HAVING condition [, ...] ]
[ { UNION | INTERSECT | EXCEPT } [ ALL ] select ]
[ ORDER BY expression [ ASC | DESC | USING operator ] [, ...] ]
[ LIMIT { count | ALL } ]
[ OFFSET start ]
[ FOR UPDATE [ OF tablename [, ...] ] ]
INPUTS
TEMPORARY
TEMP If specified, the table is created as a temporary table. Refer to CREATE TABLE [create_table(7)] for details.
new_table
The name (optionally schema-qualified) of the table to be created.
All other inputs are described in detail for SELECT [select(7)].
OUTPUTS
Refer to CREATE TABLE [create_table(7)] and SELECT [select(7)] for a summary of possible output messages.
DESCRIPTION
SELECT INTO creates a new table and fills it with data computed by a query. The data is not returned to the client, as it is with a normal
SELECT. The new table's columns have the names and data types associated with the output columns of the SELECT.
Note: CREATE TABLE AS [create_table_as(7)] is functionally equivalent to SELECT INTO. CREATE TABLE AS is the recommended syntax,
since SELECT INTO is not standard. In fact, this form of SELECT INTO is not available in PL/pgSQL or ecpg(1), because they interpret
the INTO clause differently.
COMPATIBILITY
SQL92 uses SELECT ... INTO to represent selecting values into scalar variables of a host program, rather than creating a new table. This
indeed is the usage found in PL/pgSQL and ecpg(1). The PostgreSQL usage of SELECT INTO to represent table creation is historical. It's
best to use CREATE TABLE AS for this purpose in new code. (CREATE TABLE AS isn't standard either, but it's less likely to cause confu-
sion.)
SQL - Language Statements 2002-11-22 SELECT INTO(7)