Select from column where value starts with 1 - sql

Question

i have a table T
id val1
a 199.87
b 166.56
c 100.67
d 233.45
e 177.23
I want to select those rows where val1 starts with 1
rows where val1 starts with 19.
Is there any way of doing this in SQL Server.
The data type of val1 is float.

Answer 1

1) I want to select those rows where val1 starts with 1
SELECT
*
FROM Table_1
WHERE val1 LIKE '1%'
2) rows where val1 starts with 19.
SELECT
*
FROM Table_1
WHERE val1 LIKE '19%'

Answer 2

You can use CONVERT or cast function in where clause to cast float to character data type . Below queries will generate your desired result.
select * from table1
where convert(varchar,val) like '1%';
select * from table1
where cast(val as char(10)) like '1%';
You can use anyone of the above.
Result
id val
-----------
a 199,87
b 166,56
c 100,67
e 177,23
To return val like 19, just replace 1 with 19.
You can check the demo here

Answer 3

If your data values will never exceed 200 it would be preferable not to convert them to another data type just to answer this query. Instead leave them as floats and assess them using a range comparison
SELECT * FROM t WHERE val1 >= 100 AND val1 < 200
Similarly for 19x.xx values, make it >= 190
Avoid converting data wherever possible; it adds overhead which affects query performance, and also means that indexes cannot be used - this can massively impact the performance of a query

Answer 4

You can simply use LIKE % conditioning when filtering results you selct from the table and so it goes like this.
SELECT * FROM TABLE_NAME WHERE STR(VAL1, 10, 5) LIKE '19%'
This works for me whenever I select a row containing a specific char or number of a column containing value.
EDIT: Used STR() function to convert numeric data into character data.

Answer 5

Use like operator to get your results. No need to convert datatype of Val1.
rows where val1 starts with 1:
SELECT * FROM T WHERE val1 LIKE '1%';
rows where val1 starts with 19:
SELECT * FROM T WHERE val1 LIKE '19%';

Answer 6

This question already has many good answers, below answer is a different approach.
create table table1(
id char(10),
val float
);
insert into table1 values('a',199.87);
insert into table1 values('b',166.56);
insert into table1 values('c',100.67);
insert into table1 values('d',233.45);
insert into table1 values('e',177.23);
Query
select * from table1 where (CHARINDEX( '1',val, 1))=1;
select * from table1 where (CHARINDEX( '19',val, 1))=1;
output
id val
a 199,87
b 166,56
c 100,67
e 177,23
id val
a 199,87