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When should I use UNSIGNED and SIGNED INT in MySQL?

When should I use UNSIGNED and SIGNED INT in MySQL ? What is better to use or this is just personal prefernce ? Because I've seen it used like this; ...
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Boolean vs tinyint(1) for boolean values in MySQL

What column type is best to use in a MySQL database for boolean values? I use boolean but my colleague uses tinyint(1) . ...
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How can I add comments in MySQL?

I want to add comment in SQL code. How can I do this? I'm using MySQL. 6 Answers 6 ...
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How can I check MySQL engine type for a specific table?

My MySQL database contains several tables using different storage engines (specifically myisam and innodb). How can I find out which tables are using which engine? ...
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MySQL Like multiple values

I have this MySQL query. 9 Answers 9 ...
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What is the maximum length of data I can put in a BLOB column in MySQL?

What is the maximum length of data I can put in a BLOB column in MySQL? 3 Answers 3 ...
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What is the error “Every derived table must have its own alias” in MySQL?

I am running this query on MySQL 4 Answers 4 ...
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What is the size of column of int(11) in mysql in bytes?

What is the size of column of int(11) in mysql in bytes? 11 Answers 11 ...
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Checking for an empty field with MySQL

...)" and there's one record with null hotline but it doesn't match.I'm using MySQL 5.6 – Scott Chu Apr 15 '16 at 10:16 ...
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When to use MyISAM and InnoDB? [duplicate]

... Read about Storage Engines. MyISAM: The MyISAM storage engine in MySQL. Simpler to design and create, thus better for beginners. No worries about the foreign relationships between tables. Faster than InnoDB on the whole as a result of the simpler structure thus much less costs of server ...