The MySQL documentation you cite actually says a little bit more than you mention. It also says,
A “'
” inside a string quoted with “'
” may be written as “''
”.
(Also, you linked to the MySQL 5.0 version of Table 8.1. Special Character Escape Sequences, and the current version is 5.6 — but the current Table 8.1. Special Character Escape Sequences looks pretty similar.)
I think the Postgres note on the backslash_quote (string)
parameter is informative:
This controls whether a quote mark can be represented by '
in a string literal. The preferred, SQL-standard way to represent a quote mark is by doubling it (''
) but PostgreSQL has historically also accepted '
. However, use of '
creates security risks...
That says to me that using a doubled single-quote character is a better overall and long-term choice than using a backslash to escape the single-quote.
Now if you also want to add choice of language, choice of SQL database and its non-standard quirks, and choice of query framework to the equation, then you might end up with a different choice. You don't give much information about your constraints.
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