1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
|
select @@collation_connection;
@@collation_connection
latin1_german2_ci
drop table if exists t1;
create table t1 (a char (20) not null, b int not null auto_increment, index (a,b));
insert into t1 (a) values ('ä'),('ac'),('ae'),('ad'),('Äc'),('aeb');
insert into t1 (a) values ('üc'),('uc'),('ue'),('ud'),('Ü'),('ueb'),('uf');
insert into t1 (a) values ('ö'),('oc'),('Öa'),('oe'),('od'),('Öc'),('oeb');
insert into t1 (a) values ('s'),('ss'),('ß'),('ßb'),('ssa'),('ssc'),('ßa');
insert into t1 (a) values ('eä'),('uü'),('öo'),('ää'),('ääa'),('aeae');
insert into t1 (a) values ('q'),('a'),('u'),('o'),('é'),('É'),('a');
select a,b from t1 order by a,b;
a b
a 1
a 2
ac 1
ad 1
ä 1
ae 2
ää 1
aeae 2
ääa 1
aeb 1
Äc 1
é 1
É 2
eä 1
o 1
oc 1
od 1
ö 1
oe 2
Öa 1
oeb 1
Öc 1
öo 1
q 1
s 1
ss 1
ß 2
ssa 1
ßa 2
ßb 1
ssc 1
u 1
uc 1
ud 1
ue 1
Ü 2
ueb 1
üc 1
uf 1
uü 1
select a,b from t1 order by upper(a),b;
a b
a 1
a 2
ac 1
ad 1
ä 1
ae 2
ää 1
aeae 2
ääa 1
aeb 1
Äc 1
é 1
É 2
eä 1
o 1
oc 1
od 1
ö 1
oe 2
Öa 1
oeb 1
Öc 1
öo 1
q 1
s 1
ss 1
ß 2
ssa 1
ßa 2
ßb 1
ssc 1
u 1
uc 1
ud 1
ue 1
Ü 2
ueb 1
üc 1
uf 1
uü 1
select a from t1 order by a desc;
a
uü
uf
üc
ueb
Ü
ue
ud
uc
u
ssc
ßb
ßa
ssa
ß
ss
s
q
öo
Öc
oeb
Öa
oe
ö
od
oc
o
eä
É
é
Äc
aeb
ääa
aeae
ää
ae
ä
ad
ac
a
a
check table t1;
Table Op Msg_type Msg_text
test.t1 check status OK
select * from t1 where a like "ö%";
a b
ö 1
Öa 1
Öc 1
öo 1
select * from t1 where a like binary "%É%";
a b
É 2
select * from t1 where a like "%Á%";
a b
a 1
a 2
ac 1
ad 1
ae 2
aeae 2
ääa 1
aeb 1
Öa 1
ssa 1
ßa 2
select * from t1 where a like "%U%";
a b
u 1
uc 1
ud 1
ue 1
ueb 1
uf 1
uü 1
select * from t1 where a like "%ss%";
a b
ss 1
ssa 1
ssc 1
drop table t1;
select strcmp('ä','ae'),strcmp('ae','ä'),strcmp('aeq','äq'),strcmp('äq','aeq');
strcmp('ä','ae') strcmp('ae','ä') strcmp('aeq','äq') strcmp('äq','aeq')
0 0 0 0
select strcmp('ss','ß'),strcmp('ß','ss'),strcmp('ßs','sss'),strcmp('ßq','ssq');
strcmp('ss','ß') strcmp('ß','ss') strcmp('ßs','sss') strcmp('ßq','ssq')
0 0 0 0
select strcmp('ä','af'),strcmp('a','ä'),strcmp('ää','aeq'),strcmp('ää','aeaeq');
strcmp('ä','af') strcmp('a','ä') strcmp('ää','aeq') strcmp('ää','aeaeq')
-1 -1 -1 -1
select strcmp('ss','ßa'),strcmp('ß','ssa'),strcmp('sßa','sssb'),strcmp('s','ß');
strcmp('ss','ßa') strcmp('ß','ssa') strcmp('sßa','sssb') strcmp('s','ß')
-1 -1 -1 -1
select strcmp('ö','oö'),strcmp('Ü','uü'),strcmp('ö','oeb');
strcmp('ö','oö') strcmp('Ü','uü') strcmp('ö','oeb')
-1 -1 -1
select strcmp('af','ä'),strcmp('ä','a'),strcmp('aeq','ää'),strcmp('aeaeq','ää');
strcmp('af','ä') strcmp('ä','a') strcmp('aeq','ää') strcmp('aeaeq','ää')
1 1 1 1
select strcmp('ßa','ss'),strcmp('ssa','ß'),strcmp('sssb','sßa'),strcmp('ß','s');
strcmp('ßa','ss') strcmp('ssa','ß') strcmp('sssb','sßa') strcmp('ß','s')
1 1 1 1
select strcmp('u','öa'),strcmp('u','ö');
strcmp('u','öa') strcmp('u','ö')
1 1
select strcmp('sä', 'ßa'), strcmp('aä', 'äx');
strcmp('sä', 'ßa') strcmp('aä', 'äx')
-1 -1
create table t1 (a varchar(10), key(a), fulltext (a));
insert into t1 values ("a"),("abc"),("abcd"),("hello"),("test");
select * from t1 where a like "abc%";
a
abc
abcd
select * from t1 where a like "test%";
a
test
select * from t1 where a like "te_t";
a
test
select * from t1 where match a against ("te*" in boolean mode)+0;
a
test
drop table t1;
create table t1 (word varchar(255) not null, word2 varchar(255) not null, index(word));
insert into t1 (word) values ('ss'),(0xDF),(0xE4),('ae');
update t1 set word2=word;
select word, word=binary 0xdf as t from t1 having t > 0;
word t
ß 1
select word, word=cast(0xdf AS CHAR) as t from t1 having t > 0;
word t
ss 1
ß 1
select * from t1 where word=binary 0xDF;
word word2
ß ß
select * from t1 where word=CAST(0xDF as CHAR);
word word2
ss ss
ß ß
select * from t1 where word2=binary 0xDF;
word word2
ß ß
select * from t1 where word2=CAST(0xDF as CHAR);
word word2
ss ss
ß ß
select * from t1 where word='ae';
word word2
ä ä
ae ae
select * from t1 where word= 0xe4 or word=CAST(0xe4 as CHAR);
word word2
ä ä
ae ae
select * from t1 where word between binary 0xDF and binary 0xDF;
word word2
ß ß
select * from t1 where word between CAST(0xDF AS CHAR) and CAST(0xDF AS CHAR);
word word2
ss ss
ß ß
select * from t1 where word like 'ae';
word word2
ae ae
select * from t1 where word like 'AE';
word word2
ae ae
select * from t1 where word like binary 0xDF;
word word2
ß ß
select * from t1 where word like CAST(0xDF as CHAR);
word word2
ß ß
drop table t1;
CREATE TABLE t1 (
s1 CHAR(5) CHARACTER SET latin1 COLLATE latin1_german2_ci
);
INSERT INTO t1 VALUES ('Ü');
INSERT INTO t1 VALUES ('ue');
SELECT DISTINCT s1 FROM t1;
s1
Ü
SELECT s1,COUNT(*) FROM t1 GROUP BY s1;
s1 COUNT(*)
Ü 2
SELECT COUNT(DISTINCT s1) FROM t1;
COUNT(DISTINCT s1)
1
SELECT FIELD('ue',s1), FIELD('Ü',s1), s1='ue', s1='Ü' FROM t1;
FIELD('ue',s1) FIELD('Ü',s1) s1='ue' s1='Ü'
1 1 1 1
1 1 1 1
DROP TABLE t1;
|