May 2020
Beginner
564 pages
14h 9m
English
Content preview from Learn SQL Database Programming
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Differences in RDMS (Relational Database Management Systems)
The following are the differences in built-in string functions in Oracle (noted only where different):
- SUBSTR: Instead of SUBSTRING, LEFT, and RIGHT, use SUBSTR in Oracle the same way you used SUBSTRING in MySQL. Also, use SUBSTR instead of LEFT and RIGHT.
- LENGTHB: Instead of LENGTH, use LENGTHB in Oracle the same way you used LENGTH in MySQL.
- LENGTH: Instead of CHAR_LENGTH, use LENGTH in Oracle the same way you used CHAR_LENGTH in MySQL.
- CONCAT: This only allows the concatenation of two strings.
The following are the differences in built-in string functions in SQL Server (noted only where different):
- LEN: Instead of LENGTH.
- Not available in SQL Server: CHAR_LENGTH, LPAD ...
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