SQL developers manage structured databases that power payments, healthcare, retail, and cloud systems. Cloud platforms increase demand for SQL skills, including scaling, backup systems, and security ...
How do you communicate the set of secrets (passwords, API keys, etc.) that your code needs to run? You can't just write them in the code, because that would expose them to anyone who can read the code ...
ALTER TABLE employee ADD (exp NUMBER,salary NUMBER(8,2)); --> 2.ii ALTER TABLE table_name MODIFY col_name new_dtype; --> ALTER TABLE table_name MODIFY(col_name1 new_dtype1,col_nname2 new_dtype2); ...
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