operator q understand

I use q '(...)', but in the chain, I also () but it does not throw any error

but when I check in google I got under statement about the operator of q.

Syntax:

Syntax is q '[...]', where the '[' and '] ' characters may be one of the following, as long as they are not already in the string.

!

[ ]

{ }

( )

<>

query:

Q SELECT ' (SELECT count (*) FROM Employees WHERE name = 'Smith' ;) »

DOUBLE;

My question is why he does not throw error

Hello

2742751 wrote:

I use q '(...)', but in the chain, I also () but it does not throw any error

but when I check in google I got under statement about the operator of q.

Syntax:

Syntax is q '[...]', where the '[' and '] ' characters may be one of the following, as long as they are not already in the string.

!

[ ]

{ }

( )

<>

query:

Q SELECT ' (SELECT count (*) FROM Employees WHERE name = 'Smith' ;) »

DOUBLE;

My question is why he does not throw error

Not everything you see on the internet is true.

The string literal can contain '(' et/ou').  However, it cannot contain a ')' immediately followed by a single quote; which would indicate the end of the literal.

Another misleading thing on the site you've found, it's that there's nothing special '!'.  You can use any atmosphere, quote even simple iteself as the marker of end-of-literal.  The same restriction applies: If the character that marks the end is immediately followed by a single quote, which signals the end of the literal.

Furthermore, Q is not an operator; It is a key word.

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