[ask]SQL command act like sort and grep Post: 302716629

Sponsored Content

Top Forums Programming [ask]SQL command act like sort and grep Post 302716629 by gary_w on Tuesday 16th of October 2012 04:56:55 PM

10-16-2012

Registered User

Have a look at this. Using union merges the queries together and sorts them. Logically this is not what you asked for though. Your example was getting a row on either side of the target value. This example gets the next highest and next lowest value relative to the target value. By definition the order of rows do not matter in a relational database table, so one would not really select a row on either side of a value in practice. Hopefully someone with better SQL skills can make this more efficient.

Code:

SQL> create table test (
  2  idx number);

Table created.

SQL> insert into test values (234234);

1 row created.

SQL> insert into test values (54654);

1 row created.

SQL> insert into test values (123134);

1 row created.

SQL> insert into test values (467456);

1 row created.

SQL> insert into test values (24234234);

1 row created.

SQL> insert into test values (7867867);

1 row created.

SQL> insert into test values (23424);

1 row created.

SQL> insert into test values (568567);

1 row created.

SQL> ed
Wrote file afiedt.buf

  1  select idx
  2  from test
  3  where idx=467456
  4  union
  5  select max(idx)
  6  from test
  7  where idx < 467456
  8  union
  9  select min(idx)
 10  from test
 11* where idx > 467456
SQL> /

       IDX
----------
    234234
    467456
    568567

SQL>

These 2 Users Gave Thanks to gary_w For This Post:

gary_w

View Public Profile for gary_w

Find all posts by gary_w

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

Sort/Grep Question

Hello all, I have a test file that has the format: ..... O 3.694950 -.895050 1.480000 O 5.485050 .895050 1.480000 Ti -4.590000 4.590000 2.960000 Ti -2.295000 ...

2. UNIX for Dummies Questions & Answers

Basic awk question...getting awk to act on $1 of the command itself

I have a script problem that I am not able to solve due my very limited understanding of unix/awk. This is the contents of test.sh awk '{print $1}' From the prompt if I enter: ./test.sh Hello World I would expect to see "Hello" but all I get is a blank line. Only then if I enter "Hello...

3. Shell Programming and Scripting

how to grep sort userids

hello folks i have a file that have data like /test/aa/123 /test/aa/xyz /test/bb/xyz /test/bb/123 in above lines i just wants to grep "aa" and "bb". Thanks, Bash

4. Shell Programming and Scripting

How to Sort Floating Numbers Using the Sort Command?

Hi to all. I'm trying to sort this with the Unix command sort. user1:12345678:3.5:2.5:8:1:2:3 user2:12345679:4.5:3.5:8:1:3:2 user3:12345687:5.5:2.5:6:1:3:2 user4:12345670:5.5:2.5:5:3:2:1 user5:12345671:2.5:5.5:7:2:3:1 I need to get this: user3:12345687:5.5:2.5:6:1:3:2...

5. Shell Programming and Scripting

How to grep the where clause of a SQL?

Hi UNIX Gurus, I want to use extract the where clause of a SQL present in a file. Please suggest me how can I do it. Select * from emp where emp_id>10; cat <file_name> | grep -i "where" returns whole SQL. how can I extract only "where emp_id>10;" Thanks in advance

6. Shell Programming and Scripting

Is it Possible to sort a list of hexadecimal numbers using "sort" command?

Hello Everybody :) !!!. i have question in mind, is it possible to sort a list of hexadecimal numbers using "sort" command?

7. Shell Programming and Scripting

grep from 3 lines and sort

Pseudo name=hdiskpower54 Symmetrix ID=000190101757 Logical device ID=0601 state=alive; policy=SymmOpt; priority=0; queued-IOs=0 ============================================================================== ---------------- Host --------------- - Stor - -- I/O Path - -- Stats --- ### HW...

8. Homework & Coursework Questions

Grep and Sort

Use and complete the template provided. The entire template must be completed. If you don't, your post may be deleted! 1. The problem statement, all variables and given/known data: 1. Print the number of people that are in the /etc/passwd file with the name of George 2. Sort by name and...

9. Shell Programming and Scripting

Storing multiple sql queries output into variable by running sql command only once

Hi All, I want to run multiple sql queries and store the data in variable but i want to use sql command only once. Is there a way without running sql command twice and storing.Please advise. Eg : Select 'Query 1 output' from dual; Select 'Query 2 output' from dual; I want to...

10. UNIX for Beginners Questions & Answers

Wget, grep, sort, sed in 1 command/script

Hi, I need to join these statements for efficiency, and without having to make a new directory for each batch. I'm annotating commands below. wget -q -r -l1 URL ^^ can't use -O - here and pipe | to grep because of -r grep -hrio "\b\+@\+\.\{2,4\}\+\b" * > first.txt ^^ Need to grep the output...

LEARN ABOUT V7

ppmtosixel

ppmtosixel(1)						      General Commands Manual						     ppmtosixel(1)

NAME

       ppmtosixel - convert a portable pixmap into DEC sixel format

SYNOPSIS

       ppmtosixel [-raw] [-margin] [ppmfile]

DESCRIPTION

       Reads  a  portable  pixmap  as input.  Produces sixel commands (SIX) as output.	The output is formatted for color printing, e.g. for a DEC
       LJ250 color inkjet printer.

       If RGB values from the PPM file do not have maxval=100, the RGB values are rescaled.  A printer control header and a color assignment table
       begin the SIX file.  Image data is written in a compressed format by default.  A printer control footer ends the image file.

OPTIONS

       -raw   If  specified,  each  pixel  will  be explicitly described in the image file.  If -raw is not specified, output will default to com-
	      pressed format in which identical adjacent pixels are replaced by "repeat pixel" commands.  A raw file is often an order	of  magni-
	      tude larger than a compressed file and prints much slower.

       -margin
	      If  -margin  is not specified, the image will be start at the left margin (of the window, paper, or whatever).  If -margin is speci-
	      fied, a 1.5 inch left margin will offset the image.

PRINTING

       Generally, sixel files must reach the printer unfiltered.  Use the lpr -x option or cat filename > /dev/tty0?.

BUGS

       Upon rescaling, truncation of the least significant bits of RGB values may result in poor color conversion.  If the original PPM maxval was
       greater	than  100,  rescaling  also reduces the image depth.  While the actual RGB values from the ppm file are more or less retained, the
       color palette of the LJ250 may not match the colors on your screen.  This seems to be a printer limitation.

SEE ALSO

       ppm(5)

AUTHOR

       Copyright (C) 1991 by Rick Vinci.

								   26 April 1991						     ppmtosixel(1)

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

Sort/Grep Question

Discussion started by: aarondesk

2. UNIX for Dummies Questions & Answers

Basic awk question...getting awk to act on $1 of the command itself

Discussion started by: JasonHamm

3. Shell Programming and Scripting

how to grep sort userids

Discussion started by: learnbash

4. Shell Programming and Scripting

How to Sort Floating Numbers Using the Sort Command?

Discussion started by: daniel.gbaena