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• W3School - SQL Practice 3 (Null, Update, Delete) empty. is NOT empty. blog.naver.com · 2024.05.01
• VARCHAR2 -> CLOB Copy data from the existing VARCHAR2-column to the new temporary CLOB-column: Update mytable set newClobColumn Empty the existing VARCHAR2-column: Update my table set VARCHAR2-column = NULL; 4. blog.naver.com · 2011.03.17