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1
by brian
clean slate |
1 |
drop table if exists t1,t2;
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2 |
select 0<=>0,0.0<=>0.0,0E0=0E0,"A"<=>"A",NULL<=>NULL;
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0<=>0 0.0<=>0.0 0E0=0E0 "A"<=>"A" NULL<=>NULL
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4 |
1 1 1 1 1
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select 1<=>0,0<=>NULL,NULL<=>0;
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6 |
1<=>0 0<=>NULL NULL<=>0
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7 |
0 0 0
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8 |
select 1.0<=>0.0,0.0<=>NULL,NULL<=>0.0;
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9 |
1.0<=>0.0 0.0<=>NULL NULL<=>0.0
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10 |
0 0 0
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select "A"<=>"B","A"<=>NULL,NULL<=>"A";
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"A"<=>"B" "A"<=>NULL NULL<=>"A"
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13 |
0 0 0
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14 |
select 0<=>0.0, 0.0<=>0E0, 0E0<=>"0", 10.0<=>1E1, 10<=>10.0, 10<=>1E1;
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15 |
0<=>0.0 0.0<=>0E0 0E0<=>"0" 10.0<=>1E1 10<=>10.0 10<=>1E1
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16 |
1 1 1 1 1 1
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17 |
select 1.0<=>0E1,10<=>NULL,NULL<=>0.0, NULL<=>0E0;
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18 |
1.0<=>0E1 10<=>NULL NULL<=>0.0 NULL<=>0E0
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19 |
0 0 0 0
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20 |
create table t1 (id int, value int);
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21 |
create table t2 (id int, value int);
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22 |
insert into t1 values (1,null);
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23 |
insert into t2 values (1,null);
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24 |
select t1.*, t2.*, t1.value<=>t2.value from t1, t2 where t1.id=t2.id and t1.id=1;
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25 |
id value id value t1.value<=>t2.value
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26 |
1 NULL 1 NULL 1
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27 |
select * from t1 where id <=>id;
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28 |
id value
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29 |
1 NULL
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30 |
select * from t1 where value <=> value;
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31 |
id value
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32 |
1 NULL
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33 |
select * from t1 where id <=> value or value<=>id;
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34 |
id value
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35 |
drop table t1,t2;
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36 |
create table t1 (a bigint unsigned);
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37 |
insert into t1 values (4828532208463511553);
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38 |
select * from t1 where a = '4828532208463511553';
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39 |
a
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40 |
4828532208463511553
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41 |
select * from t1 where a in ('4828532208463511553');
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42 |
a
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43 |
4828532208463511553
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44 |
drop table t1;
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