DROP TABLE IF EXISTS t1; DROP TABLE IF EXISTS t2; CREATE TABLE t1 (c1 INT, c2 CHAR(100),c3 FLOAT); INSERT INTO t1 VALUES (null,null,0.0); INSERT INTO t1 VALUES (1,'',1.0); INSERT INTO t1 VALUES (2,'abcde',2.0); INSERT INTO t1 VALUES (100,'abcdefghij',3.0); CREATE TABLE t2 (c1 INT, c2 VARCHAR(100)); INSERT INTO t2 VALUES (1,'abcde'); INSERT INTO t2 VALUES (2,'abcde'); SELECT sb1,sb2,sb3 FROM (SELECT c1 AS sb1, c2 AS sb2, c3*2 AS sb3 FROM t1) AS sb WHERE sb1 > 1; sb1 sb2 sb3 2 abcde 4 100 abcdefghij 6 SELECT AVG(sum_column1) FROM (SELECT SUM(c1) AS sum_column1 FROM t1 GROUP BY c1) AS t1; AVG(sum_column1) 34.3333 DROP TABLE t1; DROP TABLE t2; CREATE TABLE t1 (c1 INT, c2 VARCHAR(100),c3 FLOAT); INSERT INTO t1 VALUES (null,null,0.0); INSERT INTO t1 VALUES (1,'',1.0); INSERT INTO t1 VALUES (2,'abcde',2.0); INSERT INTO t1 VALUES (100,'abcdefghij',3.0); CREATE TABLE t2 (c1 INT, c2 VARCHAR(100)); INSERT INTO t2 VALUES (1,'abcde'); INSERT INTO t2 VALUES (2,'abcde'); SELECT sb1,sb2,sb3 FROM (SELECT c1 AS sb1, c2 AS sb2, c3*2 AS sb3 FROM t1) AS sb WHERE sb1 > 1; sb1 sb2 sb3 2 abcde 4 100 abcdefghij 6 SELECT AVG(sum_column1) FROM (SELECT SUM(c1) AS sum_column1 FROM t1 GROUP BY c1) AS t1; AVG(sum_column1) 34.3333 DROP TABLE t1; DROP TABLE t2; CREATE TABLE t1 (c1 INT, c2 BINARY(100),c3 FLOAT); INSERT INTO t1 VALUES (null,null,0.0); INSERT INTO t1 VALUES (1,'',1.0); INSERT INTO t1 VALUES (2,'abcde',2.0); INSERT INTO t1 VALUES (100,'abcdefghij',3.0); CREATE TABLE t2 (c1 INT, c2 VARCHAR(100)); INSERT INTO t2 VALUES (1,'abcde'); INSERT INTO t2 VALUES (2,'abcde'); SELECT sb1,sb2,sb3 FROM (SELECT c1 AS sb1, c2 AS sb2, c3*2 AS sb3 FROM t1) AS sb WHERE sb1 > 1; sb1 sb2 sb3 2 abcde 4 100 abcdefghij 6 SELECT AVG(sum_column1) FROM (SELECT SUM(c1) AS sum_column1 FROM t1 GROUP BY c1) AS t1; AVG(sum_column1) 34.3333 DROP TABLE t1; DROP TABLE t2; CREATE TABLE t1 (c1 INT, c2 VARBINARY(100),c3 FLOAT); INSERT INTO t1 VALUES (null,null,0.0); INSERT INTO t1 VALUES (1,'',1.0); INSERT INTO t1 VALUES (2,'abcde',2.0); INSERT INTO t1 VALUES (100,'abcdefghij',3.0); CREATE TABLE t2 (c1 INT, c2 VARCHAR(100)); INSERT INTO t2 VALUES (1,'abcde'); INSERT INTO t2 VALUES (2,'abcde'); SELECT sb1,sb2,sb3 FROM (SELECT c1 AS sb1, c2 AS sb2, c3*2 AS sb3 FROM t1) AS sb WHERE sb1 > 1; sb1 sb2 sb3 2 abcde 4 100 abcdefghij 6 SELECT AVG(sum_column1) FROM (SELECT SUM(c1) AS sum_column1 FROM t1 GROUP BY c1) AS t1; AVG(sum_column1) 34.3333 DROP TABLE t1; DROP TABLE t2;