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MySQL functions are predefined code blocks that perform specific operations and return a result. They are categorized into four primary types: string functions, numeric functions, date functions, and conditional (flow control) functions. String Functions Commonly used string manipulation functions include: Function Description concat(s1, ...

strlen Function Key Characteristics Strings terminate with '\0', and the function counts characters before this termination marker (excluding '\0') The input string must end with '\0' Returns size_t type, which is unsigned (common source of errors) Requires string.h header inclusion Basic Usage Example #include <stdio.h> #include <st ...

Extracting Characters from the Left Side Use left(source_text, char_count) to obtain a specified number of charcaters from the start of a string. SELECT LEFT('datastream_process', 9); -- Result: datastrea Extracting Characters from the Right Side Use right(source_text, char_count) to retrieve a defined number of characters from the end of a st ...