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drop table if exists t1; drop database if exists mysqltest; CREATE TABLE t1 (a INT, b INT, c INT, d INT); INSERT INTO t1 VALUES (1,3,0,NULL),(2,2,0,NULL),(3,4,0,NULL),(4,2,0,NULL); SELECT * FROM t1; a b c d 1 3 0 NULL 2 2 0 NULL 3 4 0 NULL 4 2 0 NULL UPDATE t1 SET c=LAST_VALUE(@last_a:=a,@last_b:=b,@last_c:=c,1), d=4211 WHERE c=0 ORDER BY b DESC LIMIT 1; SELECT @last_a, @last_b, @last_c; @last_a @last_b @last_c 3 4 0 SELECT * FROM t1; a b c d 1 3 0 NULL 2 2 0 NULL 3 4 1 4211 4 2 0 NULL DROP TABLE t1; SELECT LAST_VALUE(@last_a:=1,@last_b:=1); Catalog Database Table Table_alias Column Column_alias Type Length Max length Is_null Flags Decimals Charsetnr def LAST_VALUE(@last_a:=1,@last_b:=1) 3 1 1 N 32897 0 63 LAST_VALUE(@last_a:=1,@last_b:=1) 1 select @last_b; Catalog Database Table Table_alias Column Column_alias Type Length Max length Is_null Flags Decimals Charsetnr def @last_b 8 20 1 Y 32896 0 63 @last_b 1 SELECT LAST_VALUE(@last_a:=1,@last_b:=1.0); Catalog Database Table Table_alias Column Column_alias Type Length Max length Is_null Flags Decimals Charsetnr def LAST_VALUE(@last_a:=1,@last_b:=1.0) 246 4 3 N 32897 1 63 LAST_VALUE(@last_a:=1,@last_b:=1.0) 1.0 select @last_b; Catalog Database Table Table_alias Column Column_alias Type Length Max length Is_null Flags Decimals Charsetnr def @last_b 246 83 3 Y 32896 38 63 @last_b 1.0 SELECT LAST_VALUE(@last_a:=1,@last_b:="hello"); Catalog Database Table Table_alias Column Column_alias Type Length Max length Is_null Flags Decimals Charsetnr def LAST_VALUE(@last_a:=1,@last_b:="hello") 253 5 5 N 1 39 8 LAST_VALUE(@last_a:=1,@last_b:="hello") hello select @last_b; Catalog Database Table Table_alias Column Column_alias Type Length Max length Is_null Flags Decimals Charsetnr def @last_b 251 16777215 5 Y 0 39 8 @last_b hello SELECT date(LAST_VALUE(@last_a:=1,@last_b:="2001-02-03")); Catalog Database Table Table_alias Column Column_alias Type Length Max length Is_null Flags Decimals Charsetnr def date(LAST_VALUE(@last_a:=1,@last_b:="2001-02-03")) 10 10 10 Y 128 0 63 date(LAST_VALUE(@last_a:=1,@last_b:="2001-02-03")) 2001-02-03 select @last_b; Catalog Database Table Table_alias Column Column_alias Type Length Max length Is_null Flags Decimals Charsetnr def @last_b 251 16777215 10 Y 0 39 8 @last_b 2001-02-03 SELECT LAST_VALUE(@last_a:=1,@last_b:="2001-02-03",NULL); Catalog Database Table Table_alias Column Column_alias Type Length Max length Is_null Flags Decimals Charsetnr def LAST_VALUE(@last_a:=1,@last_b:="2001-02-03",NULL) 6 0 0 Y 32896 0 63 LAST_VALUE(@last_a:=1,@last_b:="2001-02-03",NULL) NULL select @last_b; Catalog Database Table Table_alias Column Column_alias Type Length Max length Is_null Flags Decimals Charsetnr def @last_b 251 16777215 10 Y 0 39 8 @last_b 2001-02-03 SELECT LAST_VALUE(); ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near ')' at line 1