Is there ever a time when you'd prefer empty values of a varchar to be an empty string instead of a NULL? : r/mysql
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How to Use MySQL String Functions {50 Examples}
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mysql - replace null value with empty string in several columns while fetching data - Stack Overflow
When to Use NULL and When to Use Empty String - Alibaba Cloud Community
mysql - how to overcome these type of issues where null value inserted into primary key not null column in table - Database Administrators Stack Exchange
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