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54 lines
1.4 KiB
Plaintext
54 lines
1.4 KiB
Plaintext
DROP DATABASE IF EXISTS mcs42_db;
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CREATE DATABASE mcs42_db;
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USE mcs42_db;
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SELECT @@sql_mode;
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@@sql_mode
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STRICT_TRANS_TABLES,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION
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CREATE TABLE t (col TINYINT)ENGINE=Columnstore;
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INSERT INTO t SET col = 128;
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ERROR 22003: Out of range value for column 'col' at row 1
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SELECT col FROM t;
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col
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INSERT INTO t SET col = 1 / 0;
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ERROR 22012: Division by 0
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SELECT col FROM t;
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col
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SET sql_mode='';
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INSERT INTO t SET col = 128;
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Warnings:
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Warning 1264 Out of range value for column 'col' at row 1
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SELECT col FROM t;
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col
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127
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INSERT INTO t SET col = 1 / 0;
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SELECT col FROM t;
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col
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127
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NULL
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CREATE TABLE t1 (col FLOAT)ENGINE=Columnstore;
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INSERT INTO t1 VALUES (NULL),(2.13),(-2.13),(21.5e0),(-21.5e0),(35.498),(986.512),(-376012.9751);
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SELECT col, ROUND(col), ROUND(col,1), ROUND(col,-1), ROUND(col,-2), ROUND(col,3) FROM t1;
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col ROUND(col) ROUND(col,1) ROUND(col,-1) ROUND(col,-2) ROUND(col,3)
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NULL NULL NULL NULL NULL NULL
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2.13 2 2.1 0 0 2.130
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-2.13 -2 -2.1 -0 -0 -2.130
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21.5 22 21.5 20 0 21.500
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-21.5 -22 -21.5 -20 -0 -21.500
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35.498 35 35.5 40 0 35.498
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986.512 987 986.5 990 1000 986.512
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-376013 -376013 -376013.0 -376010 -376000 -376012.969
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SELECT (.1 + .2) = .3;
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(.1 + .2) = .3
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1
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SELECT (.1e0 + .2e0) = .3e0;
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(.1e0 + .2e0) = .3e0
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0
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SELECT .01 * .01;
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.01 * .01
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0.0001
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SELECT .1 / .1;
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.1 / .1
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1.00000
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SET sql_mode=default;
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DROP DATABASE mcs42_db;
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