在SQL中，我们在哪里使用反引号和引号？

Question

I am new to SQL and still learning but one thing I am confused about is where we use ` and ' operators in SQL. Can anyone explain this?

Answer 1

Backticks ( ` ) are used to indicate database, table, and column names. Unless you're using reserved or conflicting words for table and database names, you'll not need to use them.

Quotes ( ' or " ) are used to delimit strings, and differentiate them from column names.

For example:

SELECT * FROM `database`.`table` WHERE `column` = "value";

As I mentioned, backticks aren't needed, if you use reasonable table and column names:

SELECT * FROM mydb.users WHERE username = "jim";

But strings will always need quotes. This query is comparing the value in the column username against a value in the column bob :

SELECT * FROM mydb.users WHERE username = bob;