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72 lines
3.0 KiB
Plaintext
72 lines
3.0 KiB
Plaintext
DROP DATABASE IF EXISTS mcs221_db;
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CREATE DATABASE mcs221_db;
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USE mcs221_db;
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CREATE TABLE t1(t1_d DATE, t1_t TIME, t1_dt DATETIME)ENGINE=Columnstore;
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INSERT INTO t1 VALUES(NULL, NULL, NULL);
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INSERT INTO t1 VALUES('2222-11-11', '12:12:12', '2020-11-11 12:12:12');
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INSERT INTO t1 VALUES('2020-01-01', '11:11:11', '2020-12-31 12:34:56');
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INSERT INTO t1 VALUES('2016-02-01', '11:11:11', '2017-02-01 12:12:12');
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SELECT PERIOD_DIFF(200101, 199901);
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PERIOD_DIFF(200101, 199901)
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24
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SELECT PERIOD_DIFF(200101, 200012);
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PERIOD_DIFF(200101, 200012)
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1
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SELECT PERIOD_DIFF(201001, 200001);
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PERIOD_DIFF(201001, 200001)
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120
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SELECT PERIOD_DIFF(201505, 202005);
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PERIOD_DIFF(201505, 202005)
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-60
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SELECT t1_dt, EXTRACT(YEAR_MONTH FROM t1_dt), PERIOD_DIFF(EXTRACT(YEAR_MONTH FROM t1_dt), 202011) FROM t1;
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t1_dt EXTRACT(YEAR_MONTH FROM t1_dt) PERIOD_DIFF(EXTRACT(YEAR_MONTH FROM t1_dt), 202011)
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NULL NULL NULL
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2020-11-11 12:12:12 202011 0
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2020-12-31 12:34:56 202012 1
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2017-02-01 12:12:12 201702 -45
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SELECT t1_dt, EXTRACT(YEAR_MONTH FROM t1_dt), PERIOD_DIFF(EXTRACT(YEAR_MONTH FROM t1_dt), 222212) FROM t1;
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t1_dt EXTRACT(YEAR_MONTH FROM t1_dt) PERIOD_DIFF(EXTRACT(YEAR_MONTH FROM t1_dt), 222212)
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NULL NULL NULL
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2020-11-11 12:12:12 202011 -2425
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2020-12-31 12:34:56 202012 -2424
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2017-02-01 12:12:12 201702 -2470
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SELECT t1_dt, EXTRACT(YEAR_MONTH FROM t1_dt), PERIOD_DIFF(EXTRACT(YEAR_MONTH FROM t1_dt), 201001) FROM t1;
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t1_dt EXTRACT(YEAR_MONTH FROM t1_dt) PERIOD_DIFF(EXTRACT(YEAR_MONTH FROM t1_dt), 201001)
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NULL NULL NULL
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2020-11-11 12:12:12 202011 130
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2020-12-31 12:34:56 202012 131
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2017-02-01 12:12:12 201702 85
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SELECT t1_d, EXTRACT(YEAR_MONTH FROM t1_d), PERIOD_DIFF(EXTRACT(YEAR_MONTH FROM t1_d), 202011) FROM t1;
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t1_d EXTRACT(YEAR_MONTH FROM t1_d) PERIOD_DIFF(EXTRACT(YEAR_MONTH FROM t1_d), 202011)
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NULL NULL NULL
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2222-11-11 222211 2424
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2020-01-01 202001 -10
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2016-02-01 201602 -57
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SELECT t1_d, EXTRACT(YEAR_MONTH FROM t1_d), PERIOD_DIFF(EXTRACT(YEAR_MONTH FROM t1_d), 222212) FROM t1;
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t1_d EXTRACT(YEAR_MONTH FROM t1_d) PERIOD_DIFF(EXTRACT(YEAR_MONTH FROM t1_d), 222212)
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NULL NULL NULL
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2222-11-11 222211 -1
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2020-01-01 202001 -2435
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2016-02-01 201602 -2482
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SELECT t1_t, EXTRACT(YEAR_MONTH FROM t1_t), PERIOD_DIFF(EXTRACT(YEAR_MONTH FROM t1_t), 202211) FROM t1;
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t1_t EXTRACT(YEAR_MONTH FROM t1_t) PERIOD_DIFF(EXTRACT(YEAR_MONTH FROM t1_t), 202211)
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NULL NULL NULL
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12:12:12 0 -24274
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11:11:11 0 -24274
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11:11:11 0 -24274
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SELECT t1_t, EXTRACT(YEAR_MONTH FROM t1_t), PERIOD_DIFF(EXTRACT(YEAR_MONTH FROM t1_t), 201001) FROM t1;
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t1_t EXTRACT(YEAR_MONTH FROM t1_t) PERIOD_DIFF(EXTRACT(YEAR_MONTH FROM t1_t), 201001)
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NULL NULL NULL
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12:12:12 0 -24120
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11:11:11 0 -24120
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11:11:11 0 -24120
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SELECT t1_t, EXTRACT(YEAR_MONTH FROM t1_t), PERIOD_DIFF(EXTRACT(YEAR_MONTH FROM t1_t), 202001) FROM t1;
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t1_t EXTRACT(YEAR_MONTH FROM t1_t) PERIOD_DIFF(EXTRACT(YEAR_MONTH FROM t1_t), 202001)
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NULL NULL NULL
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12:12:12 0 -24240
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11:11:11 0 -24240
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11:11:11 0 -24240
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SELECT PERIOD_DIFF(EXTRACT(YEAR_MONTH FROM t1_t)) FROM t1;
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ERROR 42000: Incorrect parameter count in the call to native function 'PERIOD_DIFF'
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DROP DATABASE mcs221_db;
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