How to escape single quotes in oracle

Oracle database uses single quotes to represent string constants and character literals. However, if the string constant itself contains single quotes, you need to use an escape sequence to tell Oracle how to handle these single quotes. Otherwise, Oracle may treat the single quote as the end of the string, causing an interpreter error.

To escape a single quote, you can add another single quote before the single quote. For example, if you want to insert the surname O'Reilly into a string, you can use the following statement:

INSERT INTO authors (last_name, first_name)
VALUES ('O''Reilly', 'Tim');

In this example, the single quote in the middle of the single quote O'Reilly is escaped into two single quotes . When Oracle parses this string, it handles O''Reilly as a single string.

If there are multiple single quotes that need to be escaped, you need to be very careful when using escape sequences. For example, if you want to insert the string She said, "It's a wonderful day!" into the database, you need to escape the two single quotes. The correct SQL statement is:

INSERT INTO mytable (message)
VALUES ('She said, "It''s a wonderful day!"');

In the above statement, each single quote is escaped into two single quotes to ensure that Oracle interprets the string correctly.

In short, escaping single quotes is a very important skill in Oracle database programming and requires great attention when writing code. Data can be safely inserted into strings containing single quotes as long as appropriate escape sequences are used.

The above is the detailed content of How to escape single quotes in oracle. For more information, please follow other related articles on the PHP Chinese website!