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74 lines
1.8 KiB
Plaintext
74 lines
1.8 KiB
Plaintext
DROP DATABASE IF EXISTS mcs182_db;
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CREATE DATABASE mcs182_db;
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USE mcs182_db;
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SET default_storage_engine=Columnstore;
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CREATE TABLE t1 (a VARCHAR(20));
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INSERT INTO t1 VALUES (repeat('a', 5)), (repeat('b', 10)), (repeat('c', 20));
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SHOW CREATE TABLE t1;
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Table Create Table
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t1 CREATE TABLE `t1` (
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`a` varchar(20) DEFAULT NULL
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) ENGINE=Columnstore DEFAULT CHARSET=latin1
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SELECT CHAR_LENGTH('MariaDB');
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CHAR_LENGTH('MariaDB')
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7
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SELECT CHAR_LENGTH(234);
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CHAR_LENGTH(234)
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3
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SELECT CHAR_LENGTH('~12ab');
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CHAR_LENGTH('~12ab')
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5
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SELECT CHAR_LENGTH('1212-12-12');
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CHAR_LENGTH('1212-12-12')
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10
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SELECT a, CHAR_LENGTH(a) FROM t1 ORDER BY a;
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a CHAR_LENGTH(a)
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aaaaa 5
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bbbbbbbbbb 10
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cccccccccccccccccccc 20
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SELECT a, CHARACTER_LENGTH(a) FROM t1 ORDER BY a;
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a CHARACTER_LENGTH(a)
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aaaaa 5
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bbbbbbbbbb 10
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cccccccccccccccccccc 20
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DROP TABLE t1;
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CREATE TABLE t1 (a CHAR(1), b INT, c DATETIME, d DOUBLE);
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INSERT INTO t1 VALUES ('', NULL, '0-0-0', NULL),('a', 12, '1212-12-12', 1.19691E+100),('b', 13, '1313-3-13 13:13:13', 2.1961E+18),('c', 14, '1414-4-14', 0.16191),('d', 15, '2015-5-15 15:15:15', 1.971917);
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SHOW CREATE TABLE t1;
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Table Create Table
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t1 CREATE TABLE `t1` (
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`a` char(1) DEFAULT NULL,
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`b` int(11) DEFAULT NULL,
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`c` datetime DEFAULT NULL,
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`d` double DEFAULT NULL
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) ENGINE=Columnstore DEFAULT CHARSET=latin1
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SELECT a, CHARACTER_LENGTH(a) FROM t1 ORDER BY a;
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a CHARACTER_LENGTH(a)
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NULL NULL
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a 1
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b 1
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c 1
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d 1
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SELECT b, CHARACTER_LENGTH(b) FROM t1 ORDER BY b;
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b CHARACTER_LENGTH(b)
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NULL NULL
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12 2
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13 2
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14 2
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15 2
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SELECT c, CHARACTER_LENGTH(c) FROM t1 ORDER BY c;
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c CHARACTER_LENGTH(c)
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0000-00-00 00:00:00 19
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1212-12-12 00:00:00 19
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1313-03-13 13:13:13 19
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1414-04-14 00:00:00 19
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2015-05-15 15:15:15 19
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SELECT d, CHARACTER_LENGTH(d) FROM t1 ORDER BY d;
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d CHARACTER_LENGTH(d)
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NULL NULL
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0.16191 7
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1.971917 8
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2.1961e18 9
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1.19691e100 11
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DROP DATABASE mcs182_db;
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