What is the diff between trigger and Cursor? [closed] - mysql

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Closed 10 years ago.
I Am New in Sql.............. I Dont Know About Diff
So Plz Suggest Me
Different Between "Trigger" and "cursor"
Thanks In Advance

Simple, TRIGGER is a special block of code on the table that fires when an event INSERT, UPDATE and/or DELETE happens on the table.
CURSOR a control structure used in databases to go through the database records. It is very similar to the iterator (eg. FOR LOOP) provided by many programming languages.

Related

Real-time SQL syntax highlighting in HTML5 [closed]

It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center.
Closed 10 years ago.
I want to use a <textarea> tag or an alternative written in JavaScript, that highlights my SQL statements as I write them (effectively the same as phpMyAdmin's SQL section where you can manually write queries.)
Please tell me that this is possible without using HUGE libraries and can be easily customizable. If so, which library should I be using and how?
http://codemirror.net/
I think I found what I wanted. Though this looks like a big library, this will do the trick. Thanks everybody.

How do i clone the content of a mysql database? [closed]

It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center.
Closed 10 years ago.
I want to be able to clone all the tables in my mysql database into another database. But the catch here is that i don't want the cloned content to be static. I want it to update synchronously with the original database. is it possible in Mysql?
You need to set up a mysql slave.

levenshtein and access database..how to integrate [closed]

It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center.
Closed 11 years ago.
could anyone help me how to integrate the levenshtein function in an accessdatabase, which I will be query-ing from vb.net later through normal sql statements.
I would like to be able to do a
SELECT levenshtein(colx, 'myinputword') AS dist FROM table WHERE dist < 3
or something like that...
I know on mysql one can create a custom function and call that afterwards, but I have no clue on how to do this in access.
or is this just not possible in access
It is possible to have custom functions in MS Access (UDF), but it is not possible to use the function outside of Access.

How dbms like Oracle, MySql and Sql Server manage "free space"? [closed]

It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center.
Closed 11 years ago.
thish is a general question about the "big" database player.
I want to know how these DBMS manage deleted record. In particular: does they free space and re-utilize that free space ?
Hope not to be off topic.
Thank you!
In general, they mark a deleted record as deleted, and they keep track of how much free space is available (and where), and will reuse the storage eventually (for new or updated records), but not necessarily in a timely manner.

about csv extension,what is the use of it [closed]

It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center.
Closed 12 years ago.
i need some information about csv extension, what is the use of csv extention, how to use it, any simple example
Here is all you could possibly want to know about CSV.
And if that doesn't satisfy your unquestionable thirst for knowledge, try the references from Wikipedia and Google.
It's just a way to indicate the type of the file, nothing more, nothing less.
Could call the file XXXX.doodleberry for all the operating system or the application using it could care about it.