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Detailed explanation of oracle substr function usage
Oracle's SUBSTR function is a function used to extract substrings from a string. This topic provides articles related to oracle substr, which you can read for free.
Detailed explanation of oracle substr function usageOracle substr function usage: 1. To extract the entire string, you can set start_position to 1 and length to the string length; 2. To extract the substring, you can specify the values of start_position and length; 3. To extract the substring starting from the specified position For strings, you can set the length value to the length of the string minus start_position plus 1; 4. Extract the last few characters; 5. Extract the substring from the specified position to the end of the string, etc.
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