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1. Retrieve NULL value | |
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2. Concatenate string with NULL value | |
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3. Working with NULL Values | |
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4. Use the IS NULL and IS NOT NULL operators | |
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5. NULL means 'not having a value' | |
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6. Disallowing NULLs | |
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7. Retrieve NOT NULL value | |
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8. List NOT NULL value and order it | |
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9. Select NOT NULL value | |
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10. IS NOT NULL in where clause | |
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11. NULL value in where clause | |
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12. Read NULL value | |
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13. Dealing With NULL Data | |
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