• NULL  (R) 

• NULLS ; added in 8.0.2 (nonreserved) 

• NUMBER 

• NUMERIC  (R) 

• NVARCHAR 

## O 

• OF  (R); added in 8.0.1 (reserved) 

• OFF ; added in 8.0.20 (nonreserved) 

• OFFSET 

• OJ ; added in 8.0.16 (nonreserved) 

• OLD ; added in 8.0.14 (nonreserved) 

• ON  (R) 

• ONE 

• ONLY 

• OPEN 

• OPTIMIZE  (R) 

• OPTIMIZER_COSTS  (R) 

• OPTION  (R) 

• OPTIONAL ; added in 8.0.13 (nonreserved) 

• OPTIONALLY  (R) 

• OPTIONS 

• OR  (R) 

• ORDER  (R) 

• ORDINALITY ; added in 8.0.4 (nonreserved) 

• ORGANIZATION ; added in 8.0.4 (nonreserved) 

• OTHERS ; added in 8.0.2 (nonreserved) 

• OUT  (R) 

• OUTER  (R) 

• OUTFILE  (R) 

• OVER  (R); added in 8.0.2 (reserved) 

