String manipulation over 2 tables in database to application
$begingroup$
I have the following function in the database to do string manipulation
create or replace FUNCTION convert_string
(
input_string IN VARCHAR2
) RETURN VARCHAR2 AS
output_string VARCHAR(8);
BEGIN
IF (input_string IS NULL) THEN
output_string := '';
ELSIF (NOT (SUBSTR(input_string, 6, 1) >= '0' AND SUBSTR(input_string, 6, 1) <= '9')) THEN
output_string := '000' || SUBSTR(input_string, 1, 5);
ELSE
output_string := '00' || input_string;
END IF;
RETURN output_string;
END convert_string;
I'm using the function to perform checking on 2 tables, so my SQL query will be
SELECT t1.name
FROM table1 t1
JOIN table2 t2 on t1.id = convert_string(t2.id)
But let say I do not want to create convert_string function in my database, and would like to do everything on the application side, what is the best way to do it?
The function above can be converted to C# code:
public string ConvertString(input)
{
if (String.IsNullOrEmpty(input))
return "";
else if (!(input[5] >= '0' && input[5] <= '9'))
return "000" + input.Substring(0,5);
else
return "00" + input;
}
Then the SQL query is to be splitted into 2 database calls
SELECT *
FROM table1
and
SELECT *
FROM table2
Those will be returned to its own datatable, and then do a loop or linq to join these 2 tables. But I wonder whether is there any more efficient / better way to do this?
c# oracle
asked 8 mins ago
rcsrcs
1011
New contributor
rcs is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
$endgroup$
add a comment |
$begingroup$
I have the following function in the database to do string manipulation
create or replace FUNCTION convert_string
(
input_string IN VARCHAR2
) RETURN VARCHAR2 AS
output_string VARCHAR(8);
BEGIN
IF (input_string IS NULL) THEN
output_string := '';
ELSIF (NOT (SUBSTR(input_string, 6, 1) >= '0' AND SUBSTR(input_string, 6, 1) <= '9')) THEN
output_string := '000' || SUBSTR(input_string, 1, 5);
ELSE
output_string := '00' || input_string;
END IF;
RETURN output_string;
END convert_string;
I'm using the function to perform checking on 2 tables, so my SQL query will be
SELECT t1.name
FROM table1 t1
JOIN table2 t2 on t1.id = convert_string(t2.id)
But let say I do not want to create convert_string function in my database, and would like to do everything on the application side, what is the best way to do it?
The function above can be converted to C# code:
public string ConvertString(input)
{
if (String.IsNullOrEmpty(input))
return "";
else if (!(input[5] >= '0' && input[5] <= '9'))
return "000" + input.Substring(0,5);
else
return "00" + input;
}
Then the SQL query is to be splitted into 2 database calls
SELECT *
FROM table1
and
SELECT *
FROM table2
Those will be returned to its own datatable, and then do a loop or linq to join these 2 tables. But I wonder whether is there any more efficient / better way to do this?
c# oracle
asked 8 mins ago
rcsrcs
1011
New contributor
rcs is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
$endgroup$
add a comment |
$begingroup$
I have the following function in the database to do string manipulation
create or replace FUNCTION convert_string
(
input_string IN VARCHAR2
) RETURN VARCHAR2 AS
output_string VARCHAR(8);
BEGIN
IF (input_string IS NULL) THEN
output_string := '';
ELSIF (NOT (SUBSTR(input_string, 6, 1) >= '0' AND SUBSTR(input_string, 6, 1) <= '9')) THEN
output_string := '000' || SUBSTR(input_string, 1, 5);
ELSE
output_string := '00' || input_string;
END IF;
RETURN output_string;
END convert_string;
I'm using the function to perform checking on 2 tables, so my SQL query will be
SELECT t1.name
FROM table1 t1
JOIN table2 t2 on t1.id = convert_string(t2.id)
But let say I do not want to create convert_string function in my database, and would like to do everything on the application side, what is the best way to do it?
The function above can be converted to C# code:
public string ConvertString(input)
{
if (String.IsNullOrEmpty(input))
return "";
else if (!(input[5] >= '0' && input[5] <= '9'))
return "000" + input.Substring(0,5);
else
return "00" + input;
}
Then the SQL query is to be splitted into 2 database calls
SELECT *
FROM table1
and
SELECT *
FROM table2
Those will be returned to its own datatable, and then do a loop or linq to join these 2 tables. But I wonder whether is there any more efficient / better way to do this?
c# oracle
asked 8 mins ago
rcsrcs
1011
New contributor
rcs is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
$endgroup$
I have the following function in the database to do string manipulation
create or replace FUNCTION convert_string
(
input_string IN VARCHAR2
) RETURN VARCHAR2 AS
output_string VARCHAR(8);
BEGIN
IF (input_string IS NULL) THEN
output_string := '';
ELSIF (NOT (SUBSTR(input_string, 6, 1) >= '0' AND SUBSTR(input_string, 6, 1) <= '9')) THEN
output_string := '000' || SUBSTR(input_string, 1, 5);
ELSE
output_string := '00' || input_string;
END IF;
RETURN output_string;
END convert_string;
I'm using the function to perform checking on 2 tables, so my SQL query will be
SELECT t1.name
FROM table1 t1
JOIN table2 t2 on t1.id = convert_string(t2.id)
But let say I do not want to create convert_string function in my database, and would like to do everything on the application side, what is the best way to do it?
The function above can be converted to C# code:
public string ConvertString(input)
{
if (String.IsNullOrEmpty(input))
return "";
else if (!(input[5] >= '0' && input[5] <= '9'))
return "000" + input.Substring(0,5);
else
return "00" + input;
}
Then the SQL query is to be splitted into 2 database calls
SELECT *
FROM table1
and
SELECT *
FROM table2
Those will be returned to its own datatable, and then do a loop or linq to join these 2 tables. But I wonder whether is there any more efficient / better way to do this?
c# oracle
c# oracle
asked 8 mins ago
rcsrcs
1011
New contributor
rcs is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 8 mins ago
rcsrcs
1011
New contributor
rcs is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 8 mins ago
rcsrcs
1011
New contributor
rcs is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 8 mins ago
rcsrcs
1011
asked 8 mins ago
rcsrcs
1011
1011
New contributor
rcs is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
rcs is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
rcs is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
add a comment |
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