oracle sql like null的相關文章
Oracle/PLSQL: NVL Function - TechOnTheNet.com

Oracle/PLSQL: NVL Function - TechOnTheNet.com

瀏覽:1124
日期:2026-04-25
The Oracle/PLSQL NVL function lets you substitute a value when a null value is encountered ... The SQL statement above would return 'n/a' if the supplier_city field contained a null value ......看更多