This question already has answers here:
What is the meaning of <> in mysql query?
(7 answers)
Closed 3 years ago.
I know this is a really beginner question, but I don't know what the meaning of this. I'm reading the existing system code. I don't know what does this symbol means <> in Query Builder.
Here is the sample code:
$builder = DB::table('product');
if (isset($product->type)) {
$builder->where('product.type', '<>', $product->type);
}
Thanks!
In MySQL syntax, this is the same as not equal or !=.
Related
This question already has answers here:
Ruby function to remove all white spaces?
(25 answers)
Closed 6 years ago.
I have a location model with an attribute name.
I want to trim(remove extra white spaces) the entire name attribute.
I tried to run
Location.TRIM(name)
But it isnt working. is the query wrong?
This is what you are looking for:
Location.update_all('name = TRIM(name)')
This question already has answers here:
Should I use != or <> for not equal in T-SQL?
(14 answers)
Closed 8 years ago.
I just wanted to know if there is a difference between <> and != when expressing inequality in SQL queries.
Technically these both function are the same, so you may choose whichever you find more readable.
The duplicate question has a relevant line:
'<>' is from the SQL-92 standard, '!=' is a proprietary T-SQL
operator.
Also to note that there are may database which doesnot != but since you have tagged it as SQL Server then there is no differenc between them
This question already has an answer here:
Relational Algebra check for error
(1 answer)
Closed 7 years ago.
Is there a way to display a sql LIKE-operator in relational algebra?
right now I have done it like this:
Ďfirstname LIKE ('B%')person
But I'm not sure if this is the right way to go.
Thanks in advance for the help.
Here is a similar question covered earlier on this site regarding how to use LIKE in relational algebra. In that case, the professor had indicated that it was ok to use LIKE just as in SQL.
This question already has answers here:
Closed 10 years ago.
Possible Duplicate:
Split Function equivalent in tsql?
I have a column that contains data in the form:
CustomerZip::12345||AccountId::1111111||s_Is_Advertiser::True||ManagedBy::3000||CustomerID::5555555||
Does SQL have any sort of built in function to easily parse out this data, or will I have to build my own complicated mess of patindex/substring functions to pull each value into its own field?
I don't believe there is anything built in. Look at the comments posted against your original question.
If this is something you're going to need on a regular basis, consider writing a view.
This question already has answers here:
Closed 11 years ago.
Possible Duplicate:
What is the n+1 selects problem?
what is N+1 type queries ?
i don't know what is this?
there is nothing like N+1 type query
areyou talking about this -->
What is SELECT N+1?
see here:
What is SELECT N+1?
:)