Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>If you're after a succinct command, then with <a href="http://www.linuxjournal.com/content/bash-extended-globbing" rel="nofollow">extended globbing in bash</a>, you should be able to use:</p> <pre><code>rm !(abc.txt) </code></pre> <p>There are however several caveats to this approach.</p> <ol> <li><p>This will run <code>rm</code> on all entries in the directory (apart from "abc.txt") and this includes subdirectories. You will therefore end up with the "cannot remove directory" error if subdirs exist. If this is the case, use <code>find</code> instead:</p> <pre><code>find . -maxdepth 1 -type f \! -name "abc.txt" -exec rm {} \; # omit -maxdepth 1 if you also want to delete files within subdirectories. </code></pre></li> <li><p>If <code>!(abc.txt)</code> returns a very long list of files, you will potentially get the infamous <a href="http://www.linuxjournal.com/article/6060" rel="nofollow">"argument list too long" error</a>. Again, <code>find</code> would be the solution to this issue.</p></li> <li><p><code>rm !(abc.txt)</code> will fail if the directory is empty or if abc.txt is the only file. Example:</p> <pre><code>[me@home]$ ls abc.txt [me@home]$ rm !(abc.txt) rm: cannot remove `!(abc.txt)': No such file or directory </code></pre> <p>You can <a href="http://mywiki.wooledge.org/NullGlob" rel="nofollow">workaround this using nullglob</a>, but it can often be cleaner to simply use <code>find</code>. To illustrate, a possible workaround would be:</p> <pre><code>shopt -s nullglob F=(!(abc.txt)); if [ ${#F[*]} -gt 0 ]; then rm !(abc.txt); fi # not pretty </code></pre></li> </ol>
    singulars
    1. This table or related slice is empty.
    1. POConditional remove in unix
      singulars
      1. PTQuestion
    1. PTAnswer
    1. USShawn Chin
    1. USShawn Chin
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. POConditional remove in unix
      singulars
      1. PTQuestion
    1. This table or related slice is empty.
    1. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTAcceptedByOriginator
    2. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    3. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    1. COThanks for your interest in providing a simple command. Is there any side effects using this? I see others are recommending shell scripts using if and a loop. Please suggest.
      singulars
      1. PO
      1. USArun
    2. COI believe a loop unnecessary for this case (and will choke on filenames with spaces if you're not careful). The `find` approach [proposed by deagh](http://stackoverflow.com/questions/12456297/conditional-remove-in-unix/12456495#12456495) is a good alternative if you also want to delete all files within subdirectories as well.
      singulars
      1. PO
      1. USShawn Chin
    3. COThere are some caveats to my solution. I'll update the answer shortly.
      singulars
      1. PO
      1. USShawn Chin
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload