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DROP TABLE IF EXISTS t1, t2;
CREATE TABLE t1 (a INT, b CHAR(8), pk INT AUTO_INCREMENT PRIMARY KEY) ENGINE=rocksdb;
INSERT INTO t1 (a,b) VALUES (100,'foobar'),(1,'z'),(200,'bar');
CREATE TABLE t2 (a INT, b CHAR(8), pk INT AUTO_INCREMENT PRIMARY KEY) ENGINE=rocksdb;
INSERT INTO t2 (a,b) SELECT a, b FROM t1;
INSERT INTO t1 (a,b) SELECT a, b FROM t2;
SELECT * FROM t1;
a b pk
1 z 2
1 z 5
100 foobar 1
100 foobar 4
200 bar 3
200 bar 6
SELECT DISTINCT a FROM t1;
a
1
100
200
SELECT ALL b, a FROM t1;
b a
bar 200
bar 200
foobar 100
foobar 100
z 1
z 1
SELECT STRAIGHT_JOIN SQL_CACHE t1.* FROM t2, t1 WHERE t1.a <> t2.a;
a b pk
1 z 2
1 z 2
1 z 5
1 z 5
100 foobar 1
100 foobar 1
100 foobar 4
100 foobar 4
200 bar 3
200 bar 3
200 bar 6
200 bar 6
SELECT SQL_SMALL_RESULT SQL_NO_CACHE t1.a FROM t1, t2;
a
1
1
1
1
1
1
100
100
100
100
100
100
200
200
200
200
200
200
SELECT SQL_BIG_RESULT SQL_CALC_FOUND_ROWS DISTINCT(t2.a)
FROM t1 t1_1, t2, t1 t1_2;
a
1
100
200
SELECT FOUND_ROWS();
FOUND_ROWS()
3
SET @save_query_cache=@@global.query_cache_size;
SET GLOBAL query_cache_size = 1024*1024;
SELECT SQL_CACHE * FROM t1, t2;
a b pk a b pk
1 z 2 1 z 2
1 z 2 100 foobar 1
1 z 2 200 bar 3
1 z 5 1 z 2
1 z 5 100 foobar 1
1 z 5 200 bar 3
100 foobar 1 1 z 2
100 foobar 1 100 foobar 1
100 foobar 1 200 bar 3
100 foobar 4 1 z 2
100 foobar 4 100 foobar 1
100 foobar 4 200 bar 3
200 bar 3 1 z 2
200 bar 3 100 foobar 1
200 bar 3 200 bar 3
200 bar 6 1 z 2
200 bar 6 100 foobar 1
200 bar 6 200 bar 3
SET @@global.query_cache_size=@save_query_cache;
SELECT a+10 AS field1, CONCAT(b,':',b) AS field2 FROM t1
WHERE b > 'b' AND a IS NOT NULL
GROUP BY 2 DESC, field1 ASC
HAVING field1 < 1000
ORDER BY field2, 1 DESC, field1*2
LIMIT 5 OFFSET 1;
field1 field2
11 z:z
110 foobar:foobar
SELECT SUM(a), MAX(a), b FROM t1 GROUP BY b WITH ROLLUP;
SUM(a) MAX(a) b
2 1 z
200 100 foobar
400 200 bar
602 200 NULL
SELECT * FROM t2 WHERE a>0 PROCEDURE ANALYSE();
Field_name Min_value Max_value Min_length Max_length Empties_or_zeros Nulls Avg_value_or_avg_length Std Optimal_fieldtype
test.t2.a 1 200 1 3 0 0 100.3333 81.2418 ENUM('1','100','200') NOT NULL
test.t2.b bar z 1 6 0 0 3.3333 NULL ENUM('bar','foobar','z') NOT NULL
test.t2.pk 1 3 1 1 0 0 2.0000 0.8165 ENUM('1','2','3') NOT NULL
SELECT t1.a, t2.b FROM t2, t1 WHERE t1.a = t2.a ORDER BY t2.b, t1.a
INTO OUTFILE '<DATADIR>/select.out'
CHARACTER SET utf8
FIELDS TERMINATED BY ',' OPTIONALLY ENCLOSED BY '''';
Warnings:
Warning 1287 '<select expression> INTO <destination>;' is deprecated and will be removed in a future release. Please use 'SELECT <select list> INTO <destination> FROM...' instead
200,'bar'
200,'bar'
100,'foobar'
100,'foobar'
1,'z'
1,'z'
SELECT t1.a, t2.b FROM t2, t1 WHERE t1.a = t2.a ORDER BY t2.b, t1.a
INTO DUMPFILE '<DATADIR>/select.dump';
ERROR 42000: Result consisted of more than one row
SELECT t1.*, t2.* FROM t1, t2 ORDER BY t2.b, t1.a, t2.a, t1.b, t1.pk, t2.pk LIMIT 1
INTO DUMPFILE '<DATADIR>/select.dump';
Warnings:
Warning 1287 '<select expression> INTO <destination>;' is deprecated and will be removed in a future release. Please use 'SELECT <select list> INTO <destination> FROM...' instead
1z2200bar3
SELECT MIN(a), MAX(a) FROM t1 INTO @min, @max;
Warnings:
Warning 1287 '<select expression> INTO <destination>;' is deprecated and will be removed in a future release. Please use 'SELECT <select list> INTO <destination> FROM...' instead
SELECT @min, @max;
@min @max
1 200
SELECT t1_1.*, t2.* FROM t2, t1 AS t1_1, t1 AS t1_2
WHERE t1_1.a = t1_2.a AND t2.a = t1_1.a;
a b pk a b pk
1 z 2 1 z 2
1 z 2 1 z 2
1 z 5 1 z 2
1 z 5 1 z 2
100 foobar 1 100 foobar 1
100 foobar 1 100 foobar 1
100 foobar 4 100 foobar 1
100 foobar 4 100 foobar 1
200 bar 3 200 bar 3
200 bar 3 200 bar 3
200 bar 6 200 bar 3
200 bar 6 200 bar 3
SELECT alias1.* FROM ( SELECT a,b FROM t1 ) alias1, t2 WHERE t2.a IN (100,200);
a b
1 z
1 z
1 z
1 z
100 foobar
100 foobar
100 foobar
100 foobar
200 bar
200 bar
200 bar
200 bar
SELECT t1.a FROM { OJ t1 LEFT OUTER JOIN t2 ON t1.a = t2.a+10 };
a
1
1
100
100
200
200
SELECT t1.* FROM t2 INNER JOIN t1;
a b pk
1 z 2
1 z 2
1 z 2
1 z 5
1 z 5
1 z 5
100 foobar 1
100 foobar 1
100 foobar 1
100 foobar 4
100 foobar 4
100 foobar 4
200 bar 3
200 bar 3
200 bar 3
200 bar 6
200 bar 6
200 bar 6
SELECT t1_2.* FROM t1 t1_1 CROSS JOIN t1 t1_2 ON t1_1.b = t1_2.b;
a b pk
1 z 2
1 z 2
1 z 5
1 z 5
100 foobar 1
100 foobar 1
100 foobar 4
100 foobar 4
200 bar 3
200 bar 3
200 bar 6
200 bar 6
SELECT t1.a, t2.b FROM t2 STRAIGHT_JOIN t1 WHERE t1.b > t2.b;
a b
1 bar
1 bar
1 foobar
1 foobar
100 bar
100 bar
SELECT t1.a, t2.b FROM t2 STRAIGHT_JOIN t1 ON t1.b > t2.b ORDER BY t1.a, t2.b;
a b
1 bar
1 bar
1 foobar
1 foobar
100 bar
100 bar
SELECT t2.* FROM t1 LEFT JOIN t2 USING (a) ORDER BY t2.a, t2.b LIMIT 1;
a b pk
1 z 2
SELECT t2.* FROM t2 LEFT OUTER JOIN t1 ON t1.a = t2.a WHERE t1.a IS NOT NULL;
a b pk
1 z 2
1 z 2
100 foobar 1
100 foobar 1
200 bar 3
200 bar 3
SELECT SUM(t2.a) FROM t1 RIGHT JOIN t2 ON t2.b = t1.b;
SUM(t2.a)
602
SELECT MIN(t2.a) FROM t1 RIGHT OUTER JOIN t2 USING (b,a);
MIN(t2.a)
1
SELECT alias.b FROM t1 NATURAL JOIN ( SELECT a,b FROM t1 ) alias WHERE b > '';
b
bar
bar
bar
bar
foobar
foobar
foobar
foobar
z
z
z
z
SELECT t2.b FROM ( SELECT a,b FROM t1 ) alias NATURAL LEFT JOIN t2 WHERE b IS NOT NULL;
b
bar
bar
foobar
foobar
z
z
SELECT t1.*, t2.* FROM t1 NATURAL LEFT OUTER JOIN t2;
a b pk a b pk
1 z 2 1 z 2
1 z 5 NULL NULL NULL
100 foobar 1 100 foobar 1
100 foobar 4 NULL NULL NULL
200 bar 3 200 bar 3
200 bar 6 NULL NULL NULL
SELECT t2_2.* FROM t2 t2_1 NATURAL RIGHT JOIN t2 t2_2 WHERE t2_1.a IN ( SELECT a FROM t1 );
a b pk
1 z 2
100 foobar 1
200 bar 3
SELECT t1_2.b FROM t1 t1_1 NATURAL RIGHT OUTER JOIN t1 t1_2 INNER JOIN t2;
b
bar
bar
bar
bar
bar
bar
foobar
foobar
foobar
foobar
foobar
foobar
z
z
z
z
z
z
SELECT ( SELECT MIN(a) FROM ( SELECT a,b FROM t1 ) alias1 ) AS min_a FROM t2;
min_a
1
1
1
SELECT a,b FROM t2 WHERE a = ( SELECT MIN(a) FROM t1 );
a b
1 z
SELECT a,b FROM t2 WHERE b LIKE ( SELECT b FROM t1 ORDER BY b LIMIT 1 );
a b
200 bar
SELECT t2.* FROM t1 t1_outer, t2 WHERE ( t1_outer.a, t2.b ) IN ( SELECT a, b FROM t2 WHERE a = t1_outer.a );
a b pk
1 z 2
1 z 2
100 foobar 1
100 foobar 1
200 bar 3
200 bar 3
SELECT a,b FROM t2 WHERE b = ANY ( SELECT b FROM t1 WHERE a > 1 );
a b
100 foobar
200 bar
SELECT a,b FROM t2 WHERE b > ALL ( SELECT b FROM t1 WHERE b < 'foo' );
a b
1 z
100 foobar
SELECT a,b FROM t1 WHERE ROW(a, b) = ( SELECT a, b FROM t2 ORDER BY a, b LIMIT 1 );
a b
1 z
1 z
SELECT a,b FROM t1 WHERE EXISTS ( SELECT a,b FROM t2 WHERE t2.b > t1.b );
a b
100 foobar
100 foobar
200 bar
200 bar
SELECT t1.* FROM t1, t2 ORDER BY ( SELECT b FROM t1 WHERE a IS NULL ORDER BY b LIMIT 1 ) DESC;
a b pk
1 z 2
1 z 2
1 z 2
1 z 5
1 z 5
1 z 5
100 foobar 1
100 foobar 1
100 foobar 1
100 foobar 4
100 foobar 4
100 foobar 4
200 bar 3
200 bar 3
200 bar 3
200 bar 6
200 bar 6
200 bar 6
SELECT a, b FROM t1 HAVING a IN ( SELECT a FROM t2 WHERE b = t1.b );
a b
1 z
1 z
100 foobar
100 foobar
200 bar
200 bar
SELECT a,b FROM t1 UNION SELECT a,b FROM t2 UNION DISTINCT SELECT a,b FROM t1;
a b
1 z
100 foobar
200 bar
SELECT a,b FROM t1 UNION SELECT a,b FROM t2 UNION ALL SELECT a,b FROM t1;
a b
1 z
1 z
1 z
100 foobar
100 foobar
100 foobar
200 bar
200 bar
200 bar
DROP TABLE t1, t2;
|
