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Backticks vs Single Quotes in SQL: What Are the Key Differences and When Should You Use Each?
Published on 2024-11-07
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Backticks vs. Single Quotes in SQL Queries
In a CodeIgniter manual excerpt, it's mentioned that the $this->db->select() method accepts an optional second parameter to disable backtick protection of field and table names. This raises three questions:
1. What are the differences between backticks (`) and single quotes (')?
Backticks quote names in MySQL, while single quotes enclose strings. Using names without backticks, like SELECT select FROM foo, will cause a syntax error because MySQL interprets it as a keyword.
2. Is it possible to use an IF statement in a query?
Yes, the IF function can be employed in SQL SELECT statements.
3. How to interpret IF(value = "", default, value) as value`?
The IF function returns the value from the default column if value is an empty string. Otherwise, it returns the value from value itself. The result will be called value.
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