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19 maj 2009 · You should use single-quotes for string delimiters. The single-quote is the standard SQL string delimiter, and double-quotes are identifier delimiters (so you can use special words or characters in the names of tables or columns). In MySQL, double-quotes work (nonstandardly) as a string delimiter by default (unless you set ANSI SQL mode). If ...
19 gru 2021 · When you’re writing a MySQL query, there may be times when you need to include special characters in your statement. For example, suppose you want to include a quote symbol ' inside your SELECT statement like this: SELECT 'Hello, I'm Nathan';
Process the string with a function that escapes the special characters. In a C program, you can use the mysql_real_escape_string_quote() C API function to escape characters. See mysql_real_escape_string_quote().
Special characters in database and table names are encoded in the corresponding file system names as described in Section 11.2.4, “Mapping of Identifiers to File Names”.
26 sty 2024 · The simplest method to escape special characters in MySQL is by using a backslash (\). When you add a backslash before a special character, MySQL interprets the next character literally. Below are a few examples to illustrate basic escaping: SELECT 'O\'Reilly'; -- Output: O'Reilly SELECT "He said, \"Hello!\""; -- Output: He said, "Hello!"
The real_escape_string() / mysqli_real_escape_string() function escapes special characters in a string for use in an SQL query, taking into account the current character set of the connection. This function is used to create a legal SQL string that can be used in an SQL statement.
24 lis 2020 · To escape all special char except NULL, new line and tab: select * .. | mysql ... | sed 's/[\x04-\x08\x0B-\x1F\x7F]/ /g' > /tmp/file . useful link: https://stackoverflow.com/questions/6534556/how-to-remove-and-all-of-the-escape-sequences-in-a-file-using-linux-shell-sc
