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Current File : /www/server/mysql/mysql-test/suite/engines/funcs/t/general_null.test
--disable_warnings
DROP TABLE IF EXISTS t3;
--enable_warnings
CREATE TABLE t3(c1 TINYINT NULL);
INSERT INTO t3 (c1) VALUES(0);
INSERT INTO t3 (c1) VALUES(1);
INSERT INTO t3 (c1) VALUES(16);
INSERT INTO t3 (c1) VALUES(-4);
INSERT INTO t3 (c1) VALUES(-9);
INSERT INTO t3 (c1) VALUES(NULL);
INSERT INTO t3 (c1) VALUES(NULL);
INSERT INTO t3 (c1) VALUES(NULL);
SELECT MAX(c1) AS value FROM t3;
SELECT MAX(c1) AS postive_value FROM t3 WHERE c1 > 0;
SELECT MAX(c1) AS negative_value FROM t3 WHERE c1 < 0;
SELECT MAX(c1) AS negative_value FROM t3 WHERE c1 = 2;
DROP TABLE t3;
CREATE TABLE t3(c1 SMALLINT NULL);
INSERT INTO t3 (c1) VALUES(0);
INSERT INTO t3 (c1) VALUES(1);
INSERT INTO t3 (c1) VALUES(16);
INSERT INTO t3 (c1) VALUES(-4);
INSERT INTO t3 (c1) VALUES(-9);
INSERT INTO t3 (c1) VALUES(NULL);
INSERT INTO t3 (c1) VALUES(NULL);
INSERT INTO t3 (c1) VALUES(NULL);
SELECT MAX(c1) AS value FROM t3;
SELECT MAX(c1) AS postive_value FROM t3 WHERE c1 > 0;
SELECT MAX(c1) AS negative_value FROM t3 WHERE c1 < 0;
SELECT MAX(c1) AS negative_value FROM t3 WHERE c1 = 2;
DROP TABLE t3;
CREATE TABLE t3(c1 MEDIUMINT NULL);
INSERT INTO t3 (c1) VALUES(0);
INSERT INTO t3 (c1) VALUES(1);
INSERT INTO t3 (c1) VALUES(16);
INSERT INTO t3 (c1) VALUES(-4);
INSERT INTO t3 (c1) VALUES(-9);
INSERT INTO t3 (c1) VALUES(NULL);
INSERT INTO t3 (c1) VALUES(NULL);
INSERT INTO t3 (c1) VALUES(NULL);
SELECT MAX(c1) AS value FROM t3;
SELECT MAX(c1) AS postive_value FROM t3 WHERE c1 > 0;
SELECT MAX(c1) AS negative_value FROM t3 WHERE c1 < 0;
SELECT MAX(c1) AS negative_value FROM t3 WHERE c1 = 2;
DROP TABLE t3;
CREATE TABLE t3(c1 INT NULL);
INSERT INTO t3 (c1) VALUES(0);
INSERT INTO t3 (c1) VALUES(1);
INSERT INTO t3 (c1) VALUES(16);
INSERT INTO t3 (c1) VALUES(-4);
INSERT INTO t3 (c1) VALUES(-9);
INSERT INTO t3 (c1) VALUES(NULL);
INSERT INTO t3 (c1) VALUES(NULL);
INSERT INTO t3 (c1) VALUES(NULL);
SELECT MAX(c1) AS value FROM t3;
SELECT MAX(c1) AS postive_value FROM t3 WHERE c1 > 0;
SELECT MAX(c1) AS negative_value FROM t3 WHERE c1 < 0;
SELECT MAX(c1) AS negative_value FROM t3 WHERE c1 = 2;
DROP TABLE t3;
CREATE TABLE t3(c1 INTEGER NULL);
INSERT INTO t3 (c1) VALUES(0);
INSERT INTO t3 (c1) VALUES(1);
INSERT INTO t3 (c1) VALUES(16);
INSERT INTO t3 (c1) VALUES(-4);
INSERT INTO t3 (c1) VALUES(-9);
INSERT INTO t3 (c1) VALUES(NULL);
INSERT INTO t3 (c1) VALUES(NULL);
INSERT INTO t3 (c1) VALUES(NULL);
SELECT MAX(c1) AS value FROM t3;
SELECT MAX(c1) AS postive_value FROM t3 WHERE c1 > 0;
SELECT MAX(c1) AS negative_value FROM t3 WHERE c1 < 0;
SELECT MAX(c1) AS negative_value FROM t3 WHERE c1 = 2;
DROP TABLE t3;
CREATE TABLE t3(c1 BIGINT NULL);
INSERT INTO t3 (c1) VALUES(0);
INSERT INTO t3 (c1) VALUES(1);
INSERT INTO t3 (c1) VALUES(16);
INSERT INTO t3 (c1) VALUES(-4);
INSERT INTO t3 (c1) VALUES(-9);
INSERT INTO t3 (c1) VALUES(NULL);
INSERT INTO t3 (c1) VALUES(NULL);
INSERT INTO t3 (c1) VALUES(NULL);
SELECT MAX(c1) AS value FROM t3;
SELECT MAX(c1) AS postive_value FROM t3 WHERE c1 > 0;
SELECT MAX(c1) AS negative_value FROM t3 WHERE c1 < 0;
SELECT MAX(c1) AS negative_value FROM t3 WHERE c1 = 2;
DROP TABLE t3;
CREATE TABLE t3(c1 TINYINT NULL);
INSERT INTO t3 (c1) VALUES(0);
INSERT INTO t3 (c1) VALUES(1);
INSERT INTO t3 (c1) VALUES(16);
INSERT INTO t3 (c1) VALUES(-4);
INSERT INTO t3 (c1) VALUES(-9);
INSERT INTO t3 (c1) VALUES(NULL);
INSERT INTO t3 (c1) VALUES(NULL);
INSERT INTO t3 (c1) VALUES(NULL);
SELECT MIN(c1) AS value FROM t3;
SELECT MIN(c1) AS postive_value FROM t3 WHERE c1 > 0;
SELECT MIN(c1) AS negative_value FROM t3 WHERE c1 < 0;
SELECT MIN(c1) AS negative_value FROM t3 WHERE c1 = 2;
DROP TABLE t3;
CREATE TABLE t3(c1 SMALLINT NULL);
INSERT INTO t3 (c1) VALUES(0);
INSERT INTO t3 (c1) VALUES(1);
INSERT INTO t3 (c1) VALUES(16);
INSERT INTO t3 (c1) VALUES(-4);
INSERT INTO t3 (c1) VALUES(-9);
INSERT INTO t3 (c1) VALUES(NULL);
INSERT INTO t3 (c1) VALUES(NULL);
INSERT INTO t3 (c1) VALUES(NULL);
SELECT MIN(c1) AS value FROM t3;
SELECT MIN(c1) AS postive_value FROM t3 WHERE c1 > 0;
SELECT MIN(c1) AS negative_value FROM t3 WHERE c1 < 0;
SELECT MIN(c1) AS negative_value FROM t3 WHERE c1 = 2;
DROP TABLE t3;
CREATE TABLE t3(c1 MEDIUMINT NULL);
INSERT INTO t3 (c1) VALUES(0);
INSERT INTO t3 (c1) VALUES(1);
INSERT INTO t3 (c1) VALUES(16);
INSERT INTO t3 (c1) VALUES(-4);
INSERT INTO t3 (c1) VALUES(-9);
INSERT INTO t3 (c1) VALUES(NULL);
INSERT INTO t3 (c1) VALUES(NULL);
INSERT INTO t3 (c1) VALUES(NULL);
SELECT MIN(c1) AS value FROM t3;
SELECT MIN(c1) AS postive_value FROM t3 WHERE c1 > 0;
SELECT MIN(c1) AS negative_value FROM t3 WHERE c1 < 0;
SELECT MIN(c1) AS negative_value FROM t3 WHERE c1 = 2;
DROP TABLE t3;
CREATE TABLE t3(c1 INT NULL);
INSERT INTO t3 (c1) VALUES(0);
INSERT INTO t3 (c1) VALUES(1);
INSERT INTO t3 (c1) VALUES(16);
INSERT INTO t3 (c1) VALUES(-4);
INSERT INTO t3 (c1) VALUES(-9);
INSERT INTO t3 (c1) VALUES(NULL);
INSERT INTO t3 (c1) VALUES(NULL);
INSERT INTO t3 (c1) VALUES(NULL);
SELECT MIN(c1) AS value FROM t3;
SELECT MIN(c1) AS postive_value FROM t3 WHERE c1 > 0;
SELECT MIN(c1) AS negative_value FROM t3 WHERE c1 < 0;
SELECT MIN(c1) AS negative_value FROM t3 WHERE c1 = 2;
DROP TABLE t3;
CREATE TABLE t3(c1 INTEGER NULL);
INSERT INTO t3 (c1) VALUES(0);
INSERT INTO t3 (c1) VALUES(1);
INSERT INTO t3 (c1) VALUES(16);
INSERT INTO t3 (c1) VALUES(-4);
INSERT INTO t3 (c1) VALUES(-9);
INSERT INTO t3 (c1) VALUES(NULL);
INSERT INTO t3 (c1) VALUES(NULL);
INSERT INTO t3 (c1) VALUES(NULL);
SELECT MIN(c1) AS value FROM t3;
SELECT MIN(c1) AS postive_value FROM t3 WHERE c1 > 0;
SELECT MIN(c1) AS negative_value FROM t3 WHERE c1 < 0;
SELECT MIN(c1) AS negative_value FROM t3 WHERE c1 = 2;
DROP TABLE t3;
CREATE TABLE t3(c1 BIGINT NULL);
INSERT INTO t3 (c1) VALUES(0);
INSERT INTO t3 (c1) VALUES(1);
INSERT INTO t3 (c1) VALUES(16);
INSERT INTO t3 (c1) VALUES(-4);
INSERT INTO t3 (c1) VALUES(-9);
INSERT INTO t3 (c1) VALUES(NULL);
INSERT INTO t3 (c1) VALUES(NULL);
INSERT INTO t3 (c1) VALUES(NULL);
SELECT MIN(c1) AS value FROM t3;
SELECT MIN(c1) AS postive_value FROM t3 WHERE c1 > 0;
SELECT MIN(c1) AS negative_value FROM t3 WHERE c1 < 0;
SELECT MIN(c1) AS negative_value FROM t3 WHERE c1 = 2;
DROP TABLE t3;
CREATE TABLE t3(c1 TINYINT NULL);
INSERT INTO t3 (c1) VALUES(0);
INSERT INTO t3 (c1) VALUES(1);
INSERT INTO t3 (c1) VALUES(16);
INSERT INTO t3 (c1) VALUES(-4);
INSERT INTO t3 (c1) VALUES(-9);
INSERT INTO t3 (c1) VALUES(NULL);
INSERT INTO t3 (c1) VALUES(NULL);
INSERT INTO t3 (c1) VALUES(NULL);
SELECT AVG(c1) AS value FROM t3;
SELECT AVG(c1) AS postive_value FROM t3 WHERE c1 > 0;
SELECT AVG(c1) AS negative_value FROM t3 WHERE c1 < 0;
SELECT AVG(c1) AS negative_value FROM t3 WHERE c1 = 2;
DROP TABLE t3;
CREATE TABLE t3(c1 SMALLINT NULL);
INSERT INTO t3 (c1) VALUES(0);
INSERT INTO t3 (c1) VALUES(1);
INSERT INTO t3 (c1) VALUES(16);
INSERT INTO t3 (c1) VALUES(-4);
INSERT INTO t3 (c1) VALUES(-9);
INSERT INTO t3 (c1) VALUES(NULL);
INSERT INTO t3 (c1) VALUES(NULL);
INSERT INTO t3 (c1) VALUES(NULL);
SELECT AVG(c1) AS value FROM t3;
SELECT AVG(c1) AS postive_value FROM t3 WHERE c1 > 0;
SELECT AVG(c1) AS negative_value FROM t3 WHERE c1 < 0;
SELECT AVG(c1) AS negative_value FROM t3 WHERE c1 = 2;
DROP TABLE t3;
CREATE TABLE t3(c1 MEDIUMINT NULL);
INSERT INTO t3 (c1) VALUES(0);
INSERT INTO t3 (c1) VALUES(1);
INSERT INTO t3 (c1) VALUES(16);
INSERT INTO t3 (c1) VALUES(-4);
INSERT INTO t3 (c1) VALUES(-9);
INSERT INTO t3 (c1) VALUES(NULL);
INSERT INTO t3 (c1) VALUES(NULL);
INSERT INTO t3 (c1) VALUES(NULL);
SELECT AVG(c1) AS value FROM t3;
SELECT AVG(c1) AS postive_value FROM t3 WHERE c1 > 0;
SELECT AVG(c1) AS negative_value FROM t3 WHERE c1 < 0;
SELECT AVG(c1) AS negative_value FROM t3 WHERE c1 = 2;
DROP TABLE t3;
CREATE TABLE t3(c1 INT NULL);
INSERT INTO t3 (c1) VALUES(0);
INSERT INTO t3 (c1) VALUES(1);
INSERT INTO t3 (c1) VALUES(16);
INSERT INTO t3 (c1) VALUES(-4);
INSERT INTO t3 (c1) VALUES(-9);
INSERT INTO t3 (c1) VALUES(NULL);
INSERT INTO t3 (c1) VALUES(NULL);
INSERT INTO t3 (c1) VALUES(NULL);
SELECT AVG(c1) AS value FROM t3;
SELECT AVG(c1) AS postive_value FROM t3 WHERE c1 > 0;
SELECT AVG(c1) AS negative_value FROM t3 WHERE c1 < 0;
SELECT AVG(c1) AS negative_value FROM t3 WHERE c1 = 2;
DROP TABLE t3;
CREATE TABLE t3(c1 INTEGER NULL);
INSERT INTO t3 (c1) VALUES(0);
INSERT INTO t3 (c1) VALUES(1);
INSERT INTO t3 (c1) VALUES(16);
INSERT INTO t3 (c1) VALUES(-4);
INSERT INTO t3 (c1) VALUES(-9);
INSERT INTO t3 (c1) VALUES(NULL);
INSERT INTO t3 (c1) VALUES(NULL);
INSERT INTO t3 (c1) VALUES(NULL);
SELECT AVG(c1) AS value FROM t3;
SELECT AVG(c1) AS postive_value FROM t3 WHERE c1 > 0;
SELECT AVG(c1) AS negative_value FROM t3 WHERE c1 < 0;
SELECT AVG(c1) AS negative_value FROM t3 WHERE c1 = 2;
DROP TABLE t3;
CREATE TABLE t3(c1 BIGINT NULL);
INSERT INTO t3 (c1) VALUES(0);
INSERT INTO t3 (c1) VALUES(1);
INSERT INTO t3 (c1) VALUES(16);
INSERT INTO t3 (c1) VALUES(-4);
INSERT INTO t3 (c1) VALUES(-9);
INSERT INTO t3 (c1) VALUES(NULL);
INSERT INTO t3 (c1) VALUES(NULL);
INSERT INTO t3 (c1) VALUES(NULL);
SELECT AVG(c1) AS value FROM t3;
SELECT AVG(c1) AS postive_value FROM t3 WHERE c1 > 0;
SELECT AVG(c1) AS negative_value FROM t3 WHERE c1 < 0;
SELECT AVG(c1) AS negative_value FROM t3 WHERE c1 = 2;
DROP TABLE t3;
CREATE TABLE t3(c1 TINYINT NULL);
INSERT INTO t3 (c1) VALUES(0);
INSERT INTO t3 (c1) VALUES(1);
INSERT INTO t3 (c1) VALUES(16);
INSERT INTO t3 (c1) VALUES(-4);
INSERT INTO t3 (c1) VALUES(-9);
INSERT INTO t3 (c1) VALUES(NULL);
INSERT INTO t3 (c1) VALUES(NULL);
INSERT INTO t3 (c1) VALUES(NULL);
SELECT SUM(c1) AS value FROM t3;
SELECT SUM(c1) AS postive_value FROM t3 WHERE c1 > 0;
SELECT SUM(c1) AS negative_value FROM t3 WHERE c1 < 0;
SELECT SUM(c1) AS negative_value FROM t3 WHERE c1 = 2;
DROP TABLE t3;
CREATE TABLE t3(c1 SMALLINT NULL);
INSERT INTO t3 (c1) VALUES(0);
INSERT INTO t3 (c1) VALUES(1);
INSERT INTO t3 (c1) VALUES(16);
INSERT INTO t3 (c1) VALUES(-4);
INSERT INTO t3 (c1) VALUES(-9);
INSERT INTO t3 (c1) VALUES(NULL);
INSERT INTO t3 (c1) VALUES(NULL);
INSERT INTO t3 (c1) VALUES(NULL);
SELECT SUM(c1) AS value FROM t3;
SELECT SUM(c1) AS postive_value FROM t3 WHERE c1 > 0;
SELECT SUM(c1) AS negative_value FROM t3 WHERE c1 < 0;
SELECT SUM(c1) AS negative_value FROM t3 WHERE c1 = 2;
DROP TABLE t3;
CREATE TABLE t3(c1 MEDIUMINT NULL);
INSERT INTO t3 (c1) VALUES(0);
INSERT INTO t3 (c1) VALUES(1);
INSERT INTO t3 (c1) VALUES(16);
INSERT INTO t3 (c1) VALUES(-4);
INSERT INTO t3 (c1) VALUES(-9);
INSERT INTO t3 (c1) VALUES(NULL);
INSERT INTO t3 (c1) VALUES(NULL);
INSERT INTO t3 (c1) VALUES(NULL);
SELECT SUM(c1) AS value FROM t3;
SELECT SUM(c1) AS postive_value FROM t3 WHERE c1 > 0;
SELECT SUM(c1) AS negative_value FROM t3 WHERE c1 < 0;
SELECT SUM(c1) AS negative_value FROM t3 WHERE c1 = 2;
DROP TABLE t3;
CREATE TABLE t3(c1 INT NULL);
INSERT INTO t3 (c1) VALUES(0);
INSERT INTO t3 (c1) VALUES(1);
INSERT INTO t3 (c1) VALUES(16);
INSERT INTO t3 (c1) VALUES(-4);
INSERT INTO t3 (c1) VALUES(-9);
INSERT INTO t3 (c1) VALUES(NULL);
INSERT INTO t3 (c1) VALUES(NULL);
INSERT INTO t3 (c1) VALUES(NULL);
SELECT SUM(c1) AS value FROM t3;
SELECT SUM(c1) AS postive_value FROM t3 WHERE c1 > 0;
SELECT SUM(c1) AS negative_value FROM t3 WHERE c1 < 0;
SELECT SUM(c1) AS negative_value FROM t3 WHERE c1 = 2;
DROP TABLE t3;
CREATE TABLE t3(c1 INTEGER NULL);
INSERT INTO t3 (c1) VALUES(0);
INSERT INTO t3 (c1) VALUES(1);
INSERT INTO t3 (c1) VALUES(16);
INSERT INTO t3 (c1) VALUES(-4);
INSERT INTO t3 (c1) VALUES(-9);
INSERT INTO t3 (c1) VALUES(NULL);
INSERT INTO t3 (c1) VALUES(NULL);
INSERT INTO t3 (c1) VALUES(NULL);
SELECT SUM(c1) AS value FROM t3;
SELECT SUM(c1) AS postive_value FROM t3 WHERE c1 > 0;
SELECT SUM(c1) AS negative_value FROM t3 WHERE c1 < 0;
SELECT SUM(c1) AS negative_value FROM t3 WHERE c1 = 2;
DROP TABLE t3;
CREATE TABLE t3(c1 BIGINT NULL);
INSERT INTO t3 (c1) VALUES(0);
INSERT INTO t3 (c1) VALUES(1);
INSERT INTO t3 (c1) VALUES(16);
INSERT INTO t3 (c1) VALUES(-4);
INSERT INTO t3 (c1) VALUES(-9);
INSERT INTO t3 (c1) VALUES(NULL);
INSERT INTO t3 (c1) VALUES(NULL);
INSERT INTO t3 (c1) VALUES(NULL);
SELECT SUM(c1) AS value FROM t3;
SELECT SUM(c1) AS postive_value FROM t3 WHERE c1 > 0;
SELECT SUM(c1) AS negative_value FROM t3 WHERE c1 < 0;
SELECT SUM(c1) AS negative_value FROM t3 WHERE c1 = 2;
DROP TABLE t3;
CREATE TABLE t3(c1 TINYINT NULL);
INSERT INTO t3 (c1) VALUES(0);
INSERT INTO t3 (c1) VALUES(1);
INSERT INTO t3 (c1) VALUES(16);
INSERT INTO t3 (c1) VALUES(-4);
INSERT INTO t3 (c1) VALUES(-9);
INSERT INTO t3 (c1) VALUES(NULL);
INSERT INTO t3 (c1) VALUES(NULL);
INSERT INTO t3 (c1) VALUES(NULL);
SELECT COUNT(c1) AS value FROM t3;
SELECT COUNT(c1) AS postive_value FROM t3 WHERE c1 > 0;
SELECT COUNT(c1) AS negative_value FROM t3 WHERE c1 < 0;
SELECT COUNT(c1) AS negative_value FROM t3 WHERE c1 = 2;
DROP TABLE t3;
CREATE TABLE t3(c1 SMALLINT NULL);
INSERT INTO t3 (c1) VALUES(0);
INSERT INTO t3 (c1) VALUES(1);
INSERT INTO t3 (c1) VALUES(16);
INSERT INTO t3 (c1) VALUES(-4);
INSERT INTO t3 (c1) VALUES(-9);
INSERT INTO t3 (c1) VALUES(NULL);
INSERT INTO t3 (c1) VALUES(NULL);
INSERT INTO t3 (c1) VALUES(NULL);
SELECT COUNT(c1) AS value FROM t3;
SELECT COUNT(c1) AS postive_value FROM t3 WHERE c1 > 0;
SELECT COUNT(c1) AS negative_value FROM t3 WHERE c1 < 0;
SELECT COUNT(c1) AS negative_value FROM t3 WHERE c1 = 2;
DROP TABLE t3;
CREATE TABLE t3(c1 MEDIUMINT NULL);
INSERT INTO t3 (c1) VALUES(0);
INSERT INTO t3 (c1) VALUES(1);
INSERT INTO t3 (c1) VALUES(16);
INSERT INTO t3 (c1) VALUES(-4);
INSERT INTO t3 (c1) VALUES(-9);
INSERT INTO t3 (c1) VALUES(NULL);
INSERT INTO t3 (c1) VALUES(NULL);
INSERT INTO t3 (c1) VALUES(NULL);
SELECT COUNT(c1) AS value FROM t3;
SELECT COUNT(c1) AS postive_value FROM t3 WHERE c1 > 0;
SELECT COUNT(c1) AS negative_value FROM t3 WHERE c1 < 0;
SELECT COUNT(c1) AS negative_value FROM t3 WHERE c1 = 2;
DROP TABLE t3;
CREATE TABLE t3(c1 INT NULL);
INSERT INTO t3 (c1) VALUES(0);
INSERT INTO t3 (c1) VALUES(1);
INSERT INTO t3 (c1) VALUES(16);
INSERT INTO t3 (c1) VALUES(-4);
INSERT INTO t3 (c1) VALUES(-9);
INSERT INTO t3 (c1) VALUES(NULL);
INSERT INTO t3 (c1) VALUES(NULL);
INSERT INTO t3 (c1) VALUES(NULL);
SELECT COUNT(c1) AS value FROM t3;
SELECT COUNT(c1) AS postive_value FROM t3 WHERE c1 > 0;
SELECT COUNT(c1) AS negative_value FROM t3 WHERE c1 < 0;
SELECT COUNT(c1) AS negative_value FROM t3 WHERE c1 = 2;
DROP TABLE t3;
CREATE TABLE t3(c1 INTEGER NULL);
INSERT INTO t3 (c1) VALUES(0);
INSERT INTO t3 (c1) VALUES(1);
INSERT INTO t3 (c1) VALUES(16);
INSERT INTO t3 (c1) VALUES(-4);
INSERT INTO t3 (c1) VALUES(-9);
INSERT INTO t3 (c1) VALUES(NULL);
INSERT INTO t3 (c1) VALUES(NULL);
INSERT INTO t3 (c1) VALUES(NULL);
SELECT COUNT(c1) AS value FROM t3;
SELECT COUNT(c1) AS postive_value FROM t3 WHERE c1 > 0;
SELECT COUNT(c1) AS negative_value FROM t3 WHERE c1 < 0;
SELECT COUNT(c1) AS negative_value FROM t3 WHERE c1 = 2;
DROP TABLE t3;
CREATE TABLE t3(c1 BIGINT NULL);
INSERT INTO t3 (c1) VALUES(0);
INSERT INTO t3 (c1) VALUES(1);
INSERT INTO t3 (c1) VALUES(16);
INSERT INTO t3 (c1) VALUES(-4);
INSERT INTO t3 (c1) VALUES(-9);
INSERT INTO t3 (c1) VALUES(NULL);
INSERT INTO t3 (c1) VALUES(NULL);
INSERT INTO t3 (c1) VALUES(NULL);
SELECT COUNT(c1) AS value FROM t3;
SELECT COUNT(c1) AS postive_value FROM t3 WHERE c1 > 0;
SELECT COUNT(c1) AS negative_value FROM t3 WHERE c1 < 0;
SELECT COUNT(c1) AS negative_value FROM t3 WHERE c1 = 2;
DROP TABLE t3;

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