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