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SELECT 10,10.0,10.,.1e+2,100.0e-1;
10 10.0 10. .1e+2 100.0e-1
10 10.0 10 10 10
SELECT 6e-05, -6e-05, --6e-05, -6e-05+1.000000;
6e-05 -6e-05 --6e-05 -6e-05+1.000000
6e-05 -6e-05 6e-05 0.99994
SELECT 1e1,1.e1,1.0e1,1e+1,1.e+1,1.0e+1,1e-1,1.e-1,1.0e-1;
1e1 1.e1 1.0e1 1e+1 1.e+1 1.0e+1 1e-1 1.e-1 1.0e-1
10 10 10 10 10 10 0.1 0.1 0.1
drop table if exists t1;
create table t1 (f1 float(24),f2 float(52));
show full columns from t1;
Field Type Null Key Default Extra Privileges
f1 float YES NULL select,insert,update,references
f2 double YES NULL select,insert,update,references
insert into t1 values(10,10),(1e+5,1e+5),(1234567890,1234567890),(1e+10,1e+10),(1e+15,1e+15),(1e+20,1e+20),(1e+50,1e+50),(1e+150,1e+150);
insert into t1 values(-10,-10),(1e-5,1e-5),(1e-10,1e-10),(1e-15,1e-15),(1e-20,1e-20),(1e-50,1e-50),(1e-150,1e-150);
select * from t1;
f1 f2
10 10
100000 100000
1.23457e+09 1234567890
1e+10 10000000000
1e+15 1e+15
1e+20 1e+20
3.40282e+38 1e+50
3.40282e+38 1e+150
-10 -10
1e-05 1e-05
1e-10 1e-10
1e-15 1e-15
1e-20 1e-20
0 1e-50
0 1e-150
drop table t1;
create table t1 (datum double);
insert into t1 values (0.5),(1.0),(1.5),(2.0),(2.5);
select * from t1;
datum
0.5
1
1.5
2
2.5
select * from t1 where datum < 1.5;
datum
0.5
1
select * from t1 where datum > 1.5;
datum
2
2.5
select * from t1 where datum = 1.5;
datum
1.5
drop table t1;
create table t1 (a decimal(7,3) not null, key (a));
insert into t1 values ("0"),("-0.00"),("-0.01"),("-0.002"),("1");
select a from t1 order by a;
a
-0.010
-0.002
-0.000
0.000
1.000
select min(a) from t1;
min(a)
-0.010
drop table t1;
create table t1 (c1 double, c2 varchar(20));
insert t1 values (121,"16");
select c1 + c1 * (c2 / 100) as col from t1;
col
140.36
create table t2 select c1 + c1 * (c2 / 100) as col1, round(c1, 5) as col2, round(c1, 35) as col3, sqrt(c1*1e-15) col4 from t1;
select * from t2;
col1 col2 col3 col4
140.36 121.00000 121 3.47850542618522e-07
show create table t2;
Table Create Table
t2 CREATE TABLE `t2` (
`col1` double default NULL,
`col2` double(22,5) default NULL,
`col3` double default NULL,
`col4` double default NULL
) TYPE=MyISAM
drop table t1,t2;
create table t1 (f float, f2 float(24), f3 float(6,2), d double, d2 float(53), d3 double(10,3), de decimal, de2 decimal(6), de3 decimal(5,2), n numeric, n2 numeric(8), n3 numeric(5,6));
show full columns from t1;
Field Type Null Key Default Extra Privileges
f float YES NULL select,insert,update,references
f2 float YES NULL select,insert,update,references
f3 float(6,2) YES NULL select,insert,update,references
d double YES NULL select,insert,update,references
d2 double YES NULL select,insert,update,references
d3 double(10,3) YES NULL select,insert,update,references
de decimal(10,0) YES NULL select,insert,update,references
de2 decimal(6,0) YES NULL select,insert,update,references
de3 decimal(5,2) YES NULL select,insert,update,references
n decimal(10,0) YES NULL select,insert,update,references
n2 decimal(8,0) YES NULL select,insert,update,references
n3 decimal(7,6) YES NULL select,insert,update,references
drop table t1;
create table t1 (a decimal(7,3) not null, key (a));
insert into t1 values ("0"),("-0.00"),("-0.01"),("-0.002"),("1");
select a from t1 order by a;
a
-0.010
-0.002
-0.000
0.000
1.000
select min(a) from t1;
min(a)
-0.010
drop table t1;
create table t1 (c20 char);
insert into t1 (c20) values (5000.0);
drop table t1;
create table t1 (f float(54));
Incorrect column specifier for column 'f'
drop table if exists t1;
create table t1 (d1 double, d2 double unsigned);
insert into t1 set d1 = -1.0;
update t1 set d2 = d1;
select * from t1;
d1 d2
-1 0
drop table t1;
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