---- btree index-- awk '{if($1<10){print;}else{next;}}' onek.data | sort +0n -1--SELECT onek.* WHERE onek.unique1 < 10;---- awk '{if($1<20){print $1,$14;}else{next;}}' onek.data | sort +0nr -1--SELECT onek.unique1, onek.stringu1   WHERE onek.unique1 < 20    ORDER BY unique1 using >;---- awk '{if($1>980){print $1,$14;}else{next;}}' onek.data | sort +1d -2--SELECT onek.unique1, onek.stringu1   WHERE onek.unique1 > 980    ORDER BY stringu1 using <;	---- awk '{if($1>980){print $1,$16;}else{next;}}' onek.data |-- sort +1d -2 +0nr -1--SELECT onek.unique1, onek.string4   WHERE onek.unique1 > 980    ORDER BY string4 using <, unique1 using >;	---- awk '{if($1>980){print $1,$16;}else{next;}}' onek.data |-- sort +1dr -2 +0n -1--SELECT onek.unique1, onek.string4   WHERE onek.unique1 > 980   ORDER BY string4 using >, unique1 using <;	---- awk '{if($1<20){print $1,$16;}else{next;}}' onek.data |-- sort +0nr -1 +1d -2--SELECT onek.unique1, onek.string4   WHERE onek.unique1 < 20   ORDER BY unique1 using >, string4 using <;---- awk '{if($1<20){print $1,$16;}else{next;}}' onek.data |-- sort +0n -1 +1dr -2--SELECT onek.unique1, onek.string4   WHERE onek.unique1 < 20    ORDER BY unique1 using <, string4 using >;---- partial btree index-- awk '{if($1<10){print $0;}else{next;}}' onek.data | sort +0n -1----SELECT onek2.* WHERE onek2.unique1 < 10;---- partial btree index-- awk '{if($1<20){print $1,$14;}else{next;}}' onek.data | sort +0nr -1----SELECT onek2.unique1, onek2.stringu1--    WHERE onek2.unique1 < 20 --    ORDER BY unique1 using >;---- awk '{if($1>980){print $1,$14;}else{next;}}' onek.data | sort +1d -2----SELECT onek2.unique1, onek2.stringu1--   WHERE onek2.unique1 > 980--   ORDER BY stringu1 using <;	SELECT two, stringu1, ten, string4   INTO TABLE tmp   FROM onek;---- awk '{print $1,$2;}' person.data |-- awk '{if(NF!=2){print $3,$2;}else{print;}}' - emp.data |-- awk '{if(NF!=2){print $3,$2;}else{print;}}' - student.data |-- awk 'BEGIN{FS="      ";}{if(NF!=2){print $4,$5;}else{print;}}' - stud_emp.data---- SELECT name, age FROM person*; ??? check if differentSELECT p.name, p.age FROM person* p;---- awk '{print $1,$2;}' person.data |-- awk '{if(NF!=2){print $3,$2;}else{print;}}' - emp.data |-- awk '{if(NF!=2){print $3,$2;}else{print;}}' - student.data |-- awk 'BEGIN{FS="      ";}{if(NF!=1){print $4,$5;}else{print;}}' - stud_emp.data |-- sort +1nr -2--SELECT p.name, p.age FROM person* p ORDER BY age using >, name;