How Do I Handle Apostrophes in SQL INSERT and SELECT Statements?
Jan 16, 2025 am 11:11 AMInsert values containing apostrophes in SQL statements
Directly inserting values containing apostrophes into SQL queries may cause errors. This is because apostrophes represent the beginning and end of strings in SQL. To solve this problem, the apostrophes need to be escaped.
For example, an apostrophe appears in the Last field of the Person table:
Insert into Person (First, Last) Values 'Joe', 'O'Brien'
This syntax will cause an error because the apostrophe following the letter O will be interpreted as the end of the string value. To fix this, just double the apostrophe to escape it:
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'
This is because apostrophes are used to separate strings. When you want to use an actual apostrophe in a string, it needs to be escaped to prevent SQL from mistaking it for the end of the string.
However, it is worth noting that developers generally do not encounter this problem when writing code. Frameworks and tools often take care of escaping special characters and preventing SQL injection vulnerabilities.
The above is the detailed content of How Do I Handle Apostrophes in SQL INSERT and SELECT Statements?. For more information, please follow other related articles on the PHP Chinese website!

Hot Article

Hot tools Tags

Hot Article

Hot Article Tags

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

Hot Topics

Reduce the use of MySQL memory in Docker

How do you alter a table in MySQL using the ALTER TABLE statement?

How to solve the problem of mysql cannot open shared library

Run MySQl in Linux (with/without podman container with phpmyadmin)

What is SQLite? Comprehensive overview

Running multiple MySQL versions on MacOS: A step-by-step guide

What are some popular MySQL GUI tools (e.g., MySQL Workbench, phpMyAdmin)?

How do I configure SSL/TLS encryption for MySQL connections?
