DROP TABLE IF EXISTS t1;
CREATE TABLE t1 (a <INT_COLUMN>, b <CHAR_COLUMN>, INDEX(b)) ENGINE=<STORAGE_ENGINE> <CUSTOM_TABLE_OPTIONS>;
INSERT INTO t1 (a,b) VALUES (1,'a'),(2,'b'),(3,'c'),(4,'d'),(5,'e'),(6,'x'),(7,'y'),(8,'z');
UPDATE t1 SET a=100, b='f' WHERE b IN ('b','c');
UPDATE t1 SET b='m' WHERE b = 'f';
UPDATE t1 SET b='z' WHERE a < 2;
UPDATE t1 SET b='';
SELECT a,b FROM t1;
a b 1 100 100 4 5 6 7 8
DROP TABLE t1;
CREATE TABLE t1 (a <INT_COLUMN>, b <CHAR_COLUMN>, UNIQUE INDEX(a)) ENGINE=<STORAGE_ENGINE> <CUSTOM_TABLE_OPTIONS>;
INSERT INTO t1 (a,b) VALUES (1,'a'),(2,'b'),(3,'c'),(4,'d'),(5,'e'),(0,'f'),(100,'a');
UPDATE t1 SET a=a+200;
UPDATE t1 SET a=0 WHERE a > 250;
UPDATE t1 SET a=205 WHERE a=200; ERROR23000: Duplicate entry '205' for key 'a'
# Statement ended with one of expected results (ER_DUP_ENTRY,ER_DUP_KEY).
# If you got a difference in error message, just add it to rdiff file
UPDATE t1 SET a=12345 ORDER BY a, b LIMIT 1;
SELECT a,b FROM t1;
a b 12345 a 200 f 201 a 202 b 203 c 204 d 205 e
UPDATE t1 SET a=80 WHERE a IN (202,203); ERROR23000: Duplicate entry '80' for key 'a'
# Statement ended with one of expected results (ER_DUP_ENTRY,ER_DUP_KEY).
# If you got a difference in error message, just add it to rdiff file
DROP TABLE t1;
CREATE TABLE t1 (a <INT_COLUMN>, b <CHAR_COLUMN>, UNIQUE INDEX(a,b)) ENGINE=<STORAGE_ENGINE> <CUSTOM_TABLE_OPTIONS>;
INSERT INTO t1 (a,b) VALUES (1,'a'),(2,'b'),(3,'c'),(4,'d'),(5,'e'),(100,'a'),(6,'f');
UPDATE t1 SET a=6 WHERE a=3;
UPDATE t1 SET a=100 WHERE a=1; ERROR23000: Duplicate entry '100-a' for key 'a'
# Statement ended with one of expected results (ER_DUP_ENTRY,ER_DUP_KEY).
# If you got a difference in error message, just add it to rdiff file
UPDATE t1 SET a=4, b='d' WHERE b='f'; ERROR23000: Duplicate entry '4-d' for key 'a'
# Statement ended with one of expected results (ER_DUP_ENTRY,ER_DUP_KEY).
# If you got a difference in error message, just add it to rdiff file
UPDATE t1 SET a=a+1;
SELECT a,b FROM t1;
a b 101 a 2 a 3 b 5 d 6 e 7 c 7 f
UPDATE t1 SET b='z'; ERROR23000: Duplicate entry '7-z' for key 'a'
# Statement ended with one of expected results (ER_DUP_ENTRY,ER_DUP_KEY).
# If you got a difference in error message, just add it to rdiff file
DROP TABLE t1;
CREATE TABLE t1 (a <INT_COLUMN> PRIMARY KEY, b <CHAR_COLUMN>) ENGINE=<STORAGE_ENGINE> <CUSTOM_TABLE_OPTIONS>;
INSERT INTO t1 (a,b) VALUES (1,'a'),(2,'b'),(3,'c'),(4,'d'),(5,'e'),(0,'f'),(100,'a');
UPDATE t1 SET a=a+200;
UPDATE t1 SET a=0 WHERE a > 250;
UPDATE t1 SET a=205 WHERE a=200; ERROR23000: Duplicate entry '205' for key 'PRIMARY'
# Statement ended with one of expected results (ER_DUP_ENTRY,ER_DUP_KEY).
# If you got a difference in error message, just add it to rdiff file
UPDATE t1 SET a=12345 ORDER BY a DESC, b LIMIT 1;
SELECT a,b FROM t1;
a b 0 a 12345 e 200 f 201 a 202 b 203 c 204 d
UPDATE t1 SET a=80 WHERE a IN (202,203); ERROR23000: Duplicate entry '80' for key 'PRIMARY'
# Statement ended with one of expected results (ER_DUP_ENTRY,ER_DUP_KEY).
# If you got a difference in error message, just add it to rdiff file
DROP TABLE t1;
Messung V0.5 in Prozent
¤ Dauer der Verarbeitung: 0.14 Sekunden
(vorverarbeitet am 2026-10-08)
¤
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