How Do I Properly Insert Apostrophes into SQL Strings?

Cleverly solve the problem of apostrophe insertion in SQL

When trying to insert a value containing an apostrophe (single quote) into a SQL database, an error may occur due to an inaccurate understanding of the closing tag. To resolve this issue, you must use the correct syntax to escape special characters in the string data.

For example, the apostrophe in the string 'O'Brien' is mistaken for the closing tag of the value. To avoid this problem, the apostrophe should be doubled, effectively escaping the special character:

INSERT INTO Person
    (First, Last)
VALUES
    ('Joe', 'O''Brien')

The same principle applies to SELECT queries:

SELECT First, Last FROM Person WHERE Last = 'O''Brien'

The importance of the apostrophe in SQL lies in its role as a special character used to indicate the boundaries of string data. Therefore, to use it in string data, the character must be escaped by doubling the single quote.

It is important to note that escaping apostrophes is usually only required when manually editing data through the raw SQL interface. In most programming environments, frameworks and technologies are capable of handling special character escaping and SQL injection protection, thus avoiding this problem.

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