drop table if exists t1,t2; create table t1 (a int not null); insert into t1 values (1); insert into t1 values (a+2); insert into t1 values (a+3); insert into t1 values (4),(a+5); select * from t1; a 1 2 3 4 5 drop table t1; create table t1 (id int not null auto_increment primary key, username varchar(32) not null, unique (username)); insert into t1 values (0,"mysql"); insert into t1 values (0,"mysql ab"); insert into t1 values (0,"mysql a"); insert into t1 values (0,"r1manic"); insert into t1 values (0,"r1man"); drop table t1; create table t1 (a int not null auto_increment, primary key (a), t timestamp, c char(10) default "hello", i int); insert into t1 values (default,default,default,default), (default,default,default,default), (4,0,"a",5),(default,default,default,default); select a,t>0,c,i from t1; a t>0 c i 1 1 hello NULL 2 1 hello NULL 4 0 a 5 5 1 hello NULL truncate table t1; insert into t1 set a=default,t=default,c=default; insert into t1 set a=default,t=default,c=default,i=default; insert into t1 set a=4,t=0,c="a",i=5; insert into t1 set a=5,t=0,c="a",i=null; insert into t1 set a=default,t=default,c=default,i=default; select a,t>0,c,i from t1; a t>0 c i 1 1 hello NULL 2 1 hello NULL 4 0 a 5 5 0 a NULL 6 1 hello NULL drop table t1; create table t1 (sid char(20), id int(2) NOT NULL auto_increment, key(sid, id)); insert into t1 values ('skr',NULL),('skr',NULL),('test',NULL); select * from t1; sid id skr 1 skr 2 test 1 insert into t1 values ('rts',NULL),('rts',NULL),('test',NULL); select * from t1; sid id rts 1 rts 2 skr 1 skr 2 test 1 test 2 drop table t1; create table t1 (id int NOT NULL DEFAULT 8); insert into t1 values(NULL); ERROR 23000: Column 'id' cannot be null insert into t1 values (1), (NULL), (2); Warnings: Warning 1263 Data truncated, NULL supplied to NOT NULL column 'id' at row 2 select * from t1; id 1 0 2 drop table t1; create table t1 (email varchar(50)); insert into t1 values ('sasha@mysql.com'),('monty@mysql.com'),('foo@hotmail.com'),('foo@aol.com'),('bar@aol.com'); create table t2(id int not null auto_increment primary key, t2 varchar(50), unique(t2)); insert delayed into t2 (t2) select distinct substring(email, locate('@', email)+1) from t1; select * from t2; id t2 1 mysql.com 2 hotmail.com 3 aol.com drop table t1,t2; drop database if exists mysqltest; create database mysqltest; use mysqltest; create table t1 (c int); insert into mysqltest.t1 set mysqltest.t1.c = '1'; drop database mysqltest; use test; create table t1( `number ` int auto_increment primary key, `original_value ` varchar(50), `f_double ` double, `f_float ` float, `f_double_7_2 ` double(7,2), `f_float_4_3 ` float (4,3), `f_double_u ` double unsigned, `f_float_u ` float unsigned, `f_double_15_1_u ` double(15,1) unsigned, `f_float_3_1_u ` float (3,1) unsigned ); set @value= "aa"; insert into t1 values(null,@value,@value,@value,@value,@value,@value,@value,@value,@value); Warnings: Warning 1265 Data truncated for column 'f_double ' at row 1 Warning 1265 Data truncated for column 'f_float ' at row 1 Warning 1265 Data truncated for column 'f_double_7_2 ' at row 1 Warning 1265 Data truncated for column 'f_float_4_3 ' at row 1 Warning 1265 Data truncated for column 'f_double_u ' at row 1 Warning 1265 Data truncated for column 'f_float_u ' at row 1 Warning 1265 Data truncated for column 'f_double_15_1_u ' at row 1 Warning 1265 Data truncated for column 'f_float_3_1_u ' at row 1 select * from t1 where `number `=last_insert_id(); number 1 original_value aa f_double 0 f_float 0 f_double_7_2 0.00 f_float_4_3 0.000 f_double_u 0 f_float_u 0 f_double_15_1_u 0.0 f_float_3_1_u 0.0 set @value= "1aa"; insert into t1 values(null,@value,@value,@value,@value,@value,@value,@value,@value,@value); Warnings: Warning 1265 Data truncated for column 'f_double ' at row 1 Warning 1265 Data truncated for column 'f_float ' at row 1 Warning 1265 Data truncated for column 'f_double_7_2 ' at row 1 Warning 1265 Data truncated for column 'f_float_4_3 ' at row 1 Warning 1265 Data truncated for column 'f_double_u ' at row 1 Warning 1265 Data truncated for column 'f_float_u ' at row 1 Warning 1265 Data truncated for column 'f_double_15_1_u ' at row 1 Warning 1265 Data truncated for column 'f_float_3_1_u ' at row 1 select * from t1 where `number `=last_insert_id(); number 2 original_value 1aa f_double 1 f_float 1 f_double_7_2 1.00 f_float_4_3 1.000 f_double_u 1 f_float_u 1 f_double_15_1_u 1.0 f_float_3_1_u 1.0 set @value= "aa1"; insert into t1 values(null,@value,@value,@value,@value,@value,@value,@value,@value,@value); Warnings: Warning 1265 Data truncated for column 'f_double ' at row 1 Warning 1265 Data truncated for column 'f_float ' at row 1 Warning 1265 Data truncated for column 'f_double_7_2 ' at row 1 Warning 1265 Data truncated for column 'f_float_4_3 ' at row 1 Warning 1265 Data truncated for column 'f_double_u ' at row 1 Warning 1265 Data truncated for column 'f_float_u ' at row 1 Warning 1265 Data truncated for column 'f_double_15_1_u ' at row 1 Warning 1265 Data truncated for column 'f_float_3_1_u ' at row 1 select * from t1 where `number `=last_insert_id(); number 3 original_value aa1 f_double 0 f_float 0 f_double_7_2 0.00 f_float_4_3 0.000 f_double_u 0 f_float_u 0 f_double_15_1_u 0.0 f_float_3_1_u 0.0 set @value= "1e+1111111111a"; insert into t1 values(null,@value,@value,@value,@value,@value,@value,@value,@value,@value); Warnings: Warning 1265 Data truncated for column 'f_double ' at row 1 Warning 1264 Data truncated, out of range for column 'f_double ' at row 1 Warning 1265 Data truncated for column 'f_float ' at row 1 Warning 1264 Data truncated, out of range for column 'f_float ' at row 1 Warning 1265 Data truncated for column 'f_double_7_2 ' at row 1 Warning 1264 Data truncated, out of range for column 'f_double_7_2 ' at row 1 Warning 1265 Data truncated for column 'f_float_4_3 ' at row 1 Warning 1264 Data truncated, out of range for column 'f_float_4_3 ' at row 1 Warning 1265 Data truncated for column 'f_double_u ' at row 1 Warning 1264 Data truncated, out of range for column 'f_double_u ' at row 1 Warning 1265 Data truncated for column 'f_float_u ' at row 1 Warning 1264 Data truncated, out of range for column 'f_float_u ' at row 1 Warning 1265 Data truncated for column 'f_double_15_1_u ' at row 1 Warning 1264 Data truncated, out of range for column 'f_double_15_1_u ' at row 1 Warning 1265 Data truncated for column 'f_float_3_1_u ' at row 1 Warning 1264 Data truncated, out of range for column 'f_float_3_1_u ' at row 1 select * from t1 where `number `=last_insert_id(); number 4 original_value 1e+1111111111a f_double 1.79769313486232e+308 f_float 3.40282e+38 f_double_7_2 99999.99 f_float_4_3 9.999 f_double_u 1.79769313486232e+308 f_float_u 3.40282e+38 f_double_15_1_u 99999999999999.9 f_float_3_1_u 99.9 set @value= "-1e+1111111111a"; insert into t1 values(null,@value,@value,@value,@value,@value,@value,@value,@value,@value); Warnings: Warning 1265 Data truncated for column 'f_double ' at row 1 Warning 1264 Data truncated, out of range for column 'f_double ' at row 1 Warning 1265 Data truncated for column 'f_float ' at row 1 Warning 1264 Data truncated, out of range for column 'f_float ' at row 1 Warning 1265 Data truncated for column 'f_double_7_2 ' at row 1 Warning 1264 Data truncated, out of range for column 'f_double_7_2 ' at row 1 Warning 1265 Data truncated for column 'f_float_4_3 ' at row 1 Warning 1264 Data truncated, out of range for column 'f_float_4_3 ' at row 1 Warning 1265 Data truncated for column 'f_double_u ' at row 1 Warning 1264 Data truncated, out of range for column 'f_double_u ' at row 1 Warning 1265 Data truncated for column 'f_float_u ' at row 1 Warning 1264 Data truncated, out of range for column 'f_float_u ' at row 1 Warning 1265 Data truncated for column 'f_double_15_1_u ' at row 1 Warning 1264 Data truncated, out of range for column 'f_double_15_1_u ' at row 1 Warning 1265 Data truncated for column 'f_float_3_1_u ' at row 1 Warning 1264 Data truncated, out of range for column 'f_float_3_1_u ' at row 1 select * from t1 where `number `=last_insert_id(); number 5 original_value -1e+1111111111a f_double -1.79769313486232e+308 f_float -3.40282e+38 f_double_7_2 -99999.99 f_float_4_3 -9.999 f_double_u 0 f_float_u 0 f_double_15_1_u 0.0 f_float_3_1_u 0.0 set @value= 1e+1111111111; insert into t1 values(null,@value,@value,@value,@value,@value,@value,@value,@value,@value); Warnings: Warning 1264 Data truncated, out of range for column 'f_double ' at row 1 Warning 1264 Data truncated, out of range for column 'f_float ' at row 1 Warning 1264 Data truncated, out of range for column 'f_double_7_2 ' at row 1 Warning 1264 Data truncated, out of range for column 'f_float_4_3 ' at row 1 Warning 1264 Data truncated, out of range for column 'f_double_u ' at row 1 Warning 1264 Data truncated, out of range for column 'f_float_u ' at row 1 Warning 1264 Data truncated, out of range for column 'f_double_15_1_u ' at row 1 Warning 1264 Data truncated, out of range for column 'f_float_3_1_u ' at row 1 select * from t1 where `number `=last_insert_id(); number 6 original_value inf f_double 1.79769313486232e+308 f_float 3.40282e+38 f_double_7_2 99999.99 f_float_4_3 9.999 f_double_u 1.79769313486232e+308 f_float_u 3.40282e+38 f_double_15_1_u 99999999999999.9 f_float_3_1_u 99.9 set @value= -1e+1111111111; insert into t1 values(null,@value,@value,@value,@value,@value,@value,@value,@value,@value); Warnings: Warning 1264 Data truncated, out of range for column 'f_double ' at row 1 Warning 1264 Data truncated, out of range for column 'f_float ' at row 1 Warning 1264 Data truncated, out of range for column 'f_double_7_2 ' at row 1 Warning 1264 Data truncated, out of range for column 'f_float_4_3 ' at row 1 Warning 1264 Data truncated, out of range for column 'f_double_u ' at row 1 Warning 1264 Data truncated, out of range for column 'f_float_u ' at row 1 Warning 1264 Data truncated, out of range for column 'f_double_15_1_u ' at row 1 Warning 1264 Data truncated, out of range for column 'f_float_3_1_u ' at row 1 select * from t1 where `number `=last_insert_id(); number 7 original_value -inf f_double -1.79769313486232e+308 f_float -3.40282e+38 f_double_7_2 -99999.99 f_float_4_3 -9.999 f_double_u 0 f_float_u 0 f_double_15_1_u 0.0 f_float_3_1_u 0.0 set @value= 1e+111; insert into t1 values(null,@value,@value,@value,@value,@value,@value,@value,@value,@value); Warnings: Warning 1264 Data truncated, out of range for column 'f_float ' at row 1 Warning 1264 Data truncated, out of range for column 'f_double_7_2 ' at row 1 Warning 1264 Data truncated, out of range for column 'f_float_4_3 ' at row 1 Warning 1264 Data truncated, out of range for column 'f_float_u ' at row 1 Warning 1264 Data truncated, out of range for column 'f_double_15_1_u ' at row 1 Warning 1264 Data truncated, out of range for column 'f_float_3_1_u ' at row 1 select * from t1 where `number `=last_insert_id(); number 8 original_value 1e+111 f_double 1e+111 f_float 3.40282e+38 f_double_7_2 99999.99 f_float_4_3 9.999 f_double_u 1e+111 f_float_u 3.40282e+38 f_double_15_1_u 99999999999999.9 f_float_3_1_u 99.9 set @value= -1e+111; insert into t1 values(null,@value,@value,@value,@value,@value,@value,@value,@value,@value); Warnings: Warning 1264 Data truncated, out of range for column 'f_float ' at row 1 Warning 1264 Data truncated, out of range for column 'f_double_7_2 ' at row 1 Warning 1264 Data truncated, out of range for column 'f_float_4_3 ' at row 1 Warning 1264 Data truncated, out of range for column 'f_double_u ' at row 1 Warning 1264 Data truncated, out of range for column 'f_float_u ' at row 1 Warning 1264 Data truncated, out of range for column 'f_double_15_1_u ' at row 1 Warning 1264 Data truncated, out of range for column 'f_float_3_1_u ' at row 1 select * from t1 where `number `=last_insert_id(); number 9 original_value -1e+111 f_double -1e+111 f_float -3.40282e+38 f_double_7_2 -99999.99 f_float_4_3 -9.999 f_double_u 0 f_float_u 0 f_double_15_1_u 0.0 f_float_3_1_u 0.0 set @value= 1; insert into t1 values(null,@value,@value,@value,@value,@value,@value,@value,@value,@value); select * from t1 where `number `=last_insert_id(); number 10 original_value 1 f_double 1 f_float 1 f_double_7_2 1.00 f_float_4_3 1.000 f_double_u 1 f_float_u 1 f_double_15_1_u 1.0 f_float_3_1_u 1.0 set @value= -1; insert into t1 values(null,@value,@value,@value,@value,@value,@value,@value,@value,@value); Warnings: Warning 1264 Data truncated, out of range for column 'f_double_u ' at row 1 Warning 1264 Data truncated, out of range for column 'f_float_u ' at row 1 Warning 1264 Data truncated, out of range for column 'f_double_15_1_u ' at row 1 Warning 1264 Data truncated, out of range for column 'f_float_3_1_u ' at row 1 select * from t1 where `number `=last_insert_id(); number 11 original_value -1 f_double -1 f_float -1 f_double_7_2 -1.00 f_float_4_3 -1.000 f_double_u 0 f_float_u 0 f_double_15_1_u 0.0 f_float_3_1_u 0.0 drop table t1;