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DROP TABLE IF EXISTS t6;
CREATE TABLE t6(c1 TINYINT UNSIGNED NULL);
INSERT INTO t6 (c1) VALUES(NULL);
INSERT INTO t6 (c1) VALUES(0);
INSERT INTO t6 (c1) VALUES(255);
SELECT * FROM t6;
c1
NULL
0
255
SELECT COUNT(c1) AS total_rows FROM t6;
total_rows
2
SELECT COUNT(c1) AS positive_rows FROM t6 WHERE c1 > 0;
positive_rows
1
SELECT COUNT(c1) AS null_rows FROM t6 WHERE c1 IS NULL;
null_rows
0
SELECT COUNT(c1) AS not_null_rows FROM t6 WHERE c1 IS NOT NULL;
not_null_rows
2
DROP TABLE t6;
CREATE TABLE t6(c1 SMALLINT UNSIGNED NULL);
INSERT INTO t6 (c1) VALUES(NULL);
INSERT INTO t6 (c1) VALUES(0);
INSERT INTO t6 (c1) VALUES(255);
SELECT * FROM t6;
c1
NULL
0
255
SELECT COUNT(c1) AS total_rows FROM t6;
total_rows
2
SELECT COUNT(c1) AS positive_rows FROM t6 WHERE c1 > 0;
positive_rows
1
SELECT COUNT(c1) AS null_rows FROM t6 WHERE c1 IS NULL;
null_rows
0
SELECT COUNT(c1) AS not_null_rows FROM t6 WHERE c1 IS NOT NULL;
not_null_rows
2
DROP TABLE t6;
CREATE TABLE t6(c1 MEDIUMINT UNSIGNED NULL);
INSERT INTO t6 (c1) VALUES(NULL);
INSERT INTO t6 (c1) VALUES(0);
INSERT INTO t6 (c1) VALUES(255);
SELECT * FROM t6;
c1
NULL
0
255
SELECT COUNT(c1) AS total_rows FROM t6;
total_rows
2
SELECT COUNT(c1) AS positive_rows FROM t6 WHERE c1 > 0;
positive_rows
1
SELECT COUNT(c1) AS null_rows FROM t6 WHERE c1 IS NULL;
null_rows
0
SELECT COUNT(c1) AS not_null_rows FROM t6 WHERE c1 IS NOT NULL;
not_null_rows
2
DROP TABLE t6;
CREATE TABLE t6(c1 INT UNSIGNED NULL);
INSERT INTO t6 (c1) VALUES(NULL);
INSERT INTO t6 (c1) VALUES(0);
INSERT INTO t6 (c1) VALUES(255);
SELECT * FROM t6;
c1
NULL
0
255
SELECT COUNT(c1) AS total_rows FROM t6;
total_rows
2
SELECT COUNT(c1) AS positive_rows FROM t6 WHERE c1 > 0;
positive_rows
1
SELECT COUNT(c1) AS null_rows FROM t6 WHERE c1 IS NULL;
null_rows
0
SELECT COUNT(c1) AS not_null_rows FROM t6 WHERE c1 IS NOT NULL;
not_null_rows
2
DROP TABLE t6;
CREATE TABLE t6(c1 INTEGER UNSIGNED NULL);
INSERT INTO t6 (c1) VALUES(NULL);
INSERT INTO t6 (c1) VALUES(0);
INSERT INTO t6 (c1) VALUES(255);
SELECT * FROM t6;
c1
NULL
0
255
SELECT COUNT(c1) AS total_rows FROM t6;
total_rows
2
SELECT COUNT(c1) AS positive_rows FROM t6 WHERE c1 > 0;
positive_rows
1
SELECT COUNT(c1) AS null_rows FROM t6 WHERE c1 IS NULL;
null_rows
0
SELECT COUNT(c1) AS not_null_rows FROM t6 WHERE c1 IS NOT NULL;
not_null_rows
2
DROP TABLE t6;
CREATE TABLE t6(c1 BIGINT UNSIGNED NULL);
INSERT INTO t6 (c1) VALUES(NULL);
INSERT INTO t6 (c1) VALUES(0);
INSERT INTO t6 (c1) VALUES(255);
SELECT * FROM t6;
c1
NULL
0
255
SELECT COUNT(c1) AS total_rows FROM t6;
total_rows
2
SELECT COUNT(c1) AS positive_rows FROM t6 WHERE c1 > 0;
positive_rows
1
SELECT COUNT(c1) AS null_rows FROM t6 WHERE c1 IS NULL;
null_rows
0
SELECT COUNT(c1) AS not_null_rows FROM t6 WHERE c1 IS NOT NULL;
not_null_rows
2
DROP TABLE t6;
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