sql - MySQL Table with TEXT column -

-

I am working on a database and I have to deal with text fields.

Now, I believe that I have seen some place mentioning that it would be best to separate textile columns from the rest of the table (by putting it in my table).

However, now I can not say that reference was received anywhere and sometime ago, I think I might misinterpret this information.

Some research has shown that

text / blobs with different metadata, if you do not need them then do not insert text / blops into results.

However, I am not familiar with the definition of "metadata" which is being used here.

So I wonder if there are any relevant benefits in their own table in a text table, what are the possible problems with the remaining areas? And potential problems in keeping it in a separate table?

This table (without textile field) is supposed to be searched (selection), but what is often considered "optimization is considered evil before time" here? (If there is a penalty in the text column, then considering it, how is relevant, it is quite easy to change later).

Besides, is there a good link on this topic? (Maybe stack overflow question and answer? I have tried to search for this topic but I only got the discussion discussions of the text)

Yes, it seems that you have misunderstood the meaning of sentences, what does it say that you only need the contents of that area, if you really want to make a selection, including a text field. The reason for this is that the Text / Blob column can contain a large amount of data that needs to be distributed on your application - it takes time and course resources.

All the best, Fabian


Comments

Post a Comment

Popular posts from this blog

c# - How to capture HTTP packet with SharpPcap -

-
I would like to capture all incoming HTTP packets on my machine. To do this, I am using SharpPcap which is a WinPcap The cover is. SharpPcap works very well, but it captures TCP packets and what it wants to do for me is a very low level. Does anyone know how can I easily get full HTTP requests / reactions from all these TCP packets? Thanks SharpPcap is already able to capture the packet in the same way That's what the virus does (just in the code instead of the GUI). And you can either either parse them directly or you can put them in the drive in the common .pcap file format. The steps to parse the capture are: Open a connection at any time Loop a while Or start capturing using an event callback Parsing the raw packet for the type you want If you are reading .PPP dump files In addition to calling you an offline capture reader is almost the same, there is no need to select an interface, and you can set the majority There is no need to do the modes. All st
Read more

jquery - SimpleModal Confirm fails to submit form -

-
I am trying to confirm jQuery to show yes / no confirmation when I submit a form. I had modified (in the last list) to capture and block form submissions. However, it only works with jQuery 1.2.6, a recent upgrade stops 1.3.2, if yes is clicked, then by submitting the form. But I can not understand what is wrong / inconsistent in my code now. Demo (which works in both versions of a simple window.href implementation). $ (document) .ready (function () {$ ('input.delete'). Click (function (e) {e.preventDefault (); var target = $ (e .target); Confirm ("Really delete this event?", Function () {target.click ()});});}); How about something like this? The idea of ​​catching clicks (and fire!) On the submitted event is not click event. $ (document) .ready (function () {$ ('# myForm'). Submit (function () {var f = this; Confirm (" Remove? ", Function () {$ (f). Submit ();}) Return; Return the initial session;}}}}; Hope That this is som
Read more

php - Multiple Select with Explode: only returns the word "Array" -

-
By using Wordpress I have created a multiple selection box so that users can select categories to exclude. When the page is initially loaded, I see my predefined default option. However, when I select a new value and I save ... I only see the word "Array" and have not chosen anything else? & lt; Class = "amultiple" id = "& lt; php echo $ value ['id'] ;? gt;" name = "& gt; php echo $ value ['id'] ;; gt; []" Multiple = "multiple" size = "8" & gt; & Lt ;? Php global option; Foreign currency ($ value as value $) {if (get_settings ($ value ['id']) === FALSE {$$ value ['id'] = $ value ['std']; } And {$$ value ['id'] = get_settings ($ value ['id']); }} $ Ranges = & amp; Amp; Categories ('type = post & orderbiz = name & amp; hide_empty = 1'); If ($ ranges) {$ ex_cat = implode (',', $ tt_cat_exclude); Forex Currency ($ range a
Read more