|
1
by brian
clean slate |
1 |
drop table if exists t1; |
2 |
create table t1(n1 int, n2 int, s char(20), vs varchar(20), t text); |
|
3 |
insert into t1 values (1,11, 'one','eleven', 'eleven'), |
|
4 |
(1,11, 'one','eleven', 'eleven'), |
|
5 |
(2,11, 'two','eleven', 'eleven'), |
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6 |
(2,12, 'two','twevle', 'twelve'), |
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7 |
(2,13, 'two','thirteen', 'foo'), |
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8 |
(2,13, 'two','thirteen', 'foo'), |
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9 |
(2,13, 'two','thirteen', 'bar'), |
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10 |
(NULL,13, 'two','thirteen', 'bar'), |
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11 |
(2,NULL, 'two','thirteen', 'bar'), |
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12 |
(2,13, NULL,'thirteen', 'bar'), |
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13 |
(2,13, 'two',NULL, 'bar'), |
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14 |
(2,13, 'two','thirteen', NULL); |
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15 |
select distinct n1 from t1; |
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16 |
n1
|
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17 |
1
|
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18 |
2
|
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19 |
NULL
|
|
20 |
select count(distinct n1) from t1; |
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21 |
count(distinct n1) |
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22 |
2
|
|
23 |
select distinct n2 from t1; |
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24 |
n2
|
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25 |
11
|
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26 |
12
|
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27 |
13
|
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28 |
NULL
|
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29 |
select count(distinct n2) from t1; |
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30 |
count(distinct n2) |
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31 |
3
|
|
32 |
select distinct s from t1; |
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33 |
s
|
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34 |
one
|
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35 |
two
|
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36 |
NULL
|
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37 |
select count(distinct s) from t1; |
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38 |
count(distinct s) |
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39 |
2
|
|
40 |
select distinct vs from t1; |
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41 |
vs
|
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42 |
eleven
|
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43 |
twevle
|
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44 |
thirteen
|
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45 |
NULL
|
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46 |
select count(distinct vs) from t1; |
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47 |
count(distinct vs) |
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48 |
3
|
|
49 |
select distinct t from t1; |
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50 |
t
|
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51 |
eleven
|
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52 |
twelve
|
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53 |
foo
|
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54 |
bar
|
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55 |
NULL
|
|
56 |
select count(distinct t) from t1; |
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57 |
count(distinct t) |
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58 |
4
|
|
59 |
select distinct n1,n2 from t1; |
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60 |
n1 n2 |
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61 |
1 11 |
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62 |
2 11 |
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63 |
2 12 |
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64 |
2 13 |
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65 |
NULL 13 |
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66 |
2 NULL |
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67 |
select count(distinct n1,n2) from t1; |
|
68 |
count(distinct n1,n2) |
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69 |
4
|
|
70 |
select distinct n1,s from t1; |
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71 |
n1 s |
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72 |
1 one |
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73 |
2 two |
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74 |
NULL two |
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75 |
2 NULL |
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76 |
select count(distinct n1,s) from t1; |
|
77 |
count(distinct n1,s) |
|
78 |
2
|
|
79 |
select distinct s,n1,vs from t1; |
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80 |
s n1 vs |
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81 |
one 1 eleven |
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82 |
two 2 eleven |
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83 |
two 2 twevle |
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84 |
two 2 thirteen |
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85 |
two NULL thirteen |
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86 |
NULL 2 thirteen |
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87 |
two 2 NULL |
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88 |
select count(distinct s,n1,vs) from t1; |
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89 |
count(distinct s,n1,vs) |
|
90 |
4
|
|
91 |
select distinct s,t from t1; |
|
92 |
s t |
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93 |
one eleven |
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94 |
two eleven |
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95 |
two twelve |
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96 |
two foo |
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97 |
two bar |
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98 |
NULL bar |
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99 |
two NULL |
|
100 |
select count(distinct s,t) from t1; |
|
101 |
count(distinct s,t) |
|
102 |
5
|
|
103 |
select count(distinct n1), count(distinct n2) from t1; |
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104 |
count(distinct n1) count(distinct n2) |
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105 |
2 3 |
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106 |
select count(distinct n2), n1 from t1 group by n1; |
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107 |
count(distinct n2) n1 |
|
108 |
1 NULL |
|
109 |
1 1 |
|
110 |
3 2 |
|
111 |
drop table t1; |
|
112 |
create table t1 (n int default NULL); |
|
113 |
flush status; |
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114 |
select count(distinct n) from t1; |
|
115 |
count(distinct n) |
|
116 |
5000
|
|
117 |
show status like 'Created_tmp_disk_tables'; |
|
118 |
Variable_name Value |
|
|
1273.16.1
by Brian Aker
More removal of show code. |
119 |
Created_tmp_disk_tables # |
|
1
by brian
clean slate |
120 |
drop table t1; |
121 |
create table t1 (s text); |
|
122 |
flush status; |
|
123 |
select count(distinct s) from t1; |
|
124 |
count(distinct s) |
|
125 |
5000
|
|
126 |
show status like 'Created_tmp_disk_tables'; |
|
127 |
Variable_name Value |
|
|
1273.16.1
by Brian Aker
More removal of show code. |
128 |
Created_tmp_disk_tables # |
|
1
by brian
clean slate |
129 |
drop table t1; |