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1
by brian
clean slate |
1 |
DROP TABLE IF EXISTS t1; |
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CREATE TABLE t1 ( number INT NOT NULL, alpha CHAR(6) NOT NULL ); |
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3 |
INSERT INTO t1 VALUES (1413006,'idlfmv'), |
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(1413065,'smpsfz'),(1413127,'sljrhx'),(1413304,'qerfnd'); |
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SELECT number, alpha, CONCAT_WS('<---->',number,alpha) AS new |
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6 |
FROM t1 GROUP BY number; |
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7 |
number alpha new |
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8 |
1413006 idlfmv 1413006<---->idlfmv |
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1413065 smpsfz 1413065<---->smpsfz |
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1413127 sljrhx 1413127<---->sljrhx |
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1413304 qerfnd 1413304<---->qerfnd |
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SELECT CONCAT_WS('<---->',number,alpha) AS new |
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FROM t1 GROUP BY new LIMIT 1; |
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new
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15 |
1413006<---->idlfmv |
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SELECT number, alpha, CONCAT_WS('<->',number,alpha) AS new |
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FROM t1 GROUP BY new LIMIT 1; |
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number alpha new |
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19 |
1413006 idlfmv 1413006<->idlfmv |
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SELECT number, alpha, CONCAT_WS('-',number,alpha,alpha,alpha,alpha,alpha,alpha,alpha) AS new |
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FROM t1 GROUP BY new LIMIT 1; |
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22 |
number alpha new |
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23 |
1413006 idlfmv 1413006-idlfmv-idlfmv-idlfmv-idlfmv-idlfmv-idlfmv-idlfmv |
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24 |
SELECT number, alpha, CONCAT_WS('<------------------>',number,alpha) AS new |
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FROM t1 GROUP BY new LIMIT 1; |
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26 |
number alpha new |
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27 |
1413006 idlfmv 1413006<------------------>idlfmv |
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28 |
drop table t1; |
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29 |
create table t1 (a char(4), b double, c date, d tinyint(4)); |
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30 |
insert into t1 values ('AAAA', 105, '2003-03-01', 1); |
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select * from t1 where concat(A,C,B,D) = 'AAAA2003-03-011051'; |
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a b c d |
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33 |
AAAA 105 2003-03-01 1 |
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34 |
drop table t1; |
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35 |
select 'a' union select concat('a', -4); |
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36 |
a
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37 |
a
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38 |
a-4 |
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39 |
select 'a' union select concat('a', -4.5); |
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40 |
a
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41 |
a
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42 |
a-4.5 |
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43 |
select 'a' union select concat('a', -(4 + 1)); |
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44 |
a
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45 |
a
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46 |
a-5 |
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47 |
select 'a' union select concat('a', 4 - 5); |
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48 |
a
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49 |
a
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50 |
a-1 |
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51 |
select 'a' union select concat('a', -'3'); |
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52 |
a
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53 |
a
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54 |
a-3 |
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55 |
select 'a' union select concat('a', -concat('3',4)); |
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56 |
a
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57 |
a
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58 |
a-34 |
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59 |
select 'a' union select concat('a', -0); |
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60 |
a
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61 |
a
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62 |
a0
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63 |
select 'a' union select concat('a', -0.0); |
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64 |
a
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65 |
a
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66 |
a0.0
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67 |
select 'a' union select concat('a', -0.0000); |
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68 |
a
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69 |
a
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70 |
a0.0000
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71 |
select concat((select x from (select 'a' as x) as t1 ), |
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72 |
(select y from (select 'b' as y) as t2 )) from (select 1 union select 2 ) |
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as t3; |
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concat((select x from (select 'a' as x) as t1 ), |
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(select y from (select 'b' as y) as t2 )) |
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76 |
ab
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77 |
ab
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78 |
create table t1(f1 varchar(6)) charset=utf8; |
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79 |
insert into t1 values ("123456"); |
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select concat(f1, 2) a from t1 union select 'x' a from t1; |
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81 |
a
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82 |
1234562
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83 |
x
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84 |
drop table t1; |