SQL Query In Java + Oracle
up vote
0
down vote
favorite
I'm really struggling to get this SQL into my head while using java.
My problem is: I want to use a variable in my sql Query, and i cant seem to get it working, it catches the correct value(i'm showing it on a label), But it doesnt show any records, yet, if i replace the variable for a '5', it shows me the correct record...
try {
Class.forName("oracle.jdbc.driver.OracleDriver");
conn = MySqlConnect.ConnectDb();
int idaca = Integer.parseInt(idhist.getText());
String query1 = "SELECT t.nome, h.Valor_Atual, h.Valor_Antigo, a.nome
FROM Tecnologias t, Historico h, Academista a
WHERE h.Id_Academista = a.Id_Academista AND a.Id_Academista = "+idaca+" AND h.Id_Tecnologia = t.Id_Tecnologia
AND (h.Valor_Atual || h.Valor_Antigo || t.nome) LIKE '%" + ValToSearch + "%'";
Statement st = conn.createStatement();
ResultSet rs = st.executeQuery(query1);
historico history;
while (rs.next()) {
history = new historico(rs.getString("Nome"), rs.getInt("Valor_Antigo"),
rs.getInt("Valor_Atual"), rs.getString("Nome"));
historicoList.add(history);
} //END WHILE
} //END TRY
catch (Exception e) {
JOptionPane.showInputDialog(null, e);
}//END CATCH
Thats my code so far... The ValToSearch is working fine, tho...
Thank you in advance! Cheers
java mysql sql
add a comment |
up vote
0
down vote
favorite
I'm really struggling to get this SQL into my head while using java.
My problem is: I want to use a variable in my sql Query, and i cant seem to get it working, it catches the correct value(i'm showing it on a label), But it doesnt show any records, yet, if i replace the variable for a '5', it shows me the correct record...
try {
Class.forName("oracle.jdbc.driver.OracleDriver");
conn = MySqlConnect.ConnectDb();
int idaca = Integer.parseInt(idhist.getText());
String query1 = "SELECT t.nome, h.Valor_Atual, h.Valor_Antigo, a.nome
FROM Tecnologias t, Historico h, Academista a
WHERE h.Id_Academista = a.Id_Academista AND a.Id_Academista = "+idaca+" AND h.Id_Tecnologia = t.Id_Tecnologia
AND (h.Valor_Atual || h.Valor_Antigo || t.nome) LIKE '%" + ValToSearch + "%'";
Statement st = conn.createStatement();
ResultSet rs = st.executeQuery(query1);
historico history;
while (rs.next()) {
history = new historico(rs.getString("Nome"), rs.getInt("Valor_Antigo"),
rs.getInt("Valor_Atual"), rs.getString("Nome"));
historicoList.add(history);
} //END WHILE
} //END TRY
catch (Exception e) {
JOptionPane.showInputDialog(null, e);
}//END CATCH
Thats my code so far... The ValToSearch is working fine, tho...
Thank you in advance! Cheers
java mysql sql
1
The ValToSearch is working fine, tho - If your query works when you manually type'%5%'
, it means thatValToSearch
is not working. However the issue might be elsewhere in your code, it's hard to tell with just two lines of code
– BackSlash
Nov 22 at 11:41
Im having problems with "+idaca+", if i replace it with 5, it works fine.. :/
– Eduardo Fernandes
Nov 22 at 11:42
please use some query builder eg stackoverflow.com/questions/5620985/…
– bato3
Nov 22 at 11:42
add space before this ANDidaca+"AND
– bato3
Nov 22 at 11:43
1
@EduardoFernandes Try to printquery1
by addingSystem.out.println("sql query --> "+query1);
– Jåcob
Nov 22 at 11:48
add a comment |
up vote
0
down vote
favorite
up vote
0
down vote
favorite
I'm really struggling to get this SQL into my head while using java.
My problem is: I want to use a variable in my sql Query, and i cant seem to get it working, it catches the correct value(i'm showing it on a label), But it doesnt show any records, yet, if i replace the variable for a '5', it shows me the correct record...
try {
Class.forName("oracle.jdbc.driver.OracleDriver");
conn = MySqlConnect.ConnectDb();
int idaca = Integer.parseInt(idhist.getText());
String query1 = "SELECT t.nome, h.Valor_Atual, h.Valor_Antigo, a.nome
FROM Tecnologias t, Historico h, Academista a
WHERE h.Id_Academista = a.Id_Academista AND a.Id_Academista = "+idaca+" AND h.Id_Tecnologia = t.Id_Tecnologia
AND (h.Valor_Atual || h.Valor_Antigo || t.nome) LIKE '%" + ValToSearch + "%'";
Statement st = conn.createStatement();
ResultSet rs = st.executeQuery(query1);
historico history;
while (rs.next()) {
history = new historico(rs.getString("Nome"), rs.getInt("Valor_Antigo"),
rs.getInt("Valor_Atual"), rs.getString("Nome"));
historicoList.add(history);
} //END WHILE
} //END TRY
catch (Exception e) {
JOptionPane.showInputDialog(null, e);
}//END CATCH
Thats my code so far... The ValToSearch is working fine, tho...
Thank you in advance! Cheers
java mysql sql
I'm really struggling to get this SQL into my head while using java.
My problem is: I want to use a variable in my sql Query, and i cant seem to get it working, it catches the correct value(i'm showing it on a label), But it doesnt show any records, yet, if i replace the variable for a '5', it shows me the correct record...
try {
Class.forName("oracle.jdbc.driver.OracleDriver");
conn = MySqlConnect.ConnectDb();
int idaca = Integer.parseInt(idhist.getText());
String query1 = "SELECT t.nome, h.Valor_Atual, h.Valor_Antigo, a.nome
FROM Tecnologias t, Historico h, Academista a
WHERE h.Id_Academista = a.Id_Academista AND a.Id_Academista = "+idaca+" AND h.Id_Tecnologia = t.Id_Tecnologia
AND (h.Valor_Atual || h.Valor_Antigo || t.nome) LIKE '%" + ValToSearch + "%'";
Statement st = conn.createStatement();
ResultSet rs = st.executeQuery(query1);
historico history;
while (rs.next()) {
history = new historico(rs.getString("Nome"), rs.getInt("Valor_Antigo"),
rs.getInt("Valor_Atual"), rs.getString("Nome"));
historicoList.add(history);
} //END WHILE
} //END TRY
catch (Exception e) {
JOptionPane.showInputDialog(null, e);
}//END CATCH
Thats my code so far... The ValToSearch is working fine, tho...
Thank you in advance! Cheers
java mysql sql
java mysql sql
edited Nov 22 at 12:13
MT0
51.7k52756
51.7k52756
asked Nov 22 at 11:38
Eduardo Fernandes
34
34
1
The ValToSearch is working fine, tho - If your query works when you manually type'%5%'
, it means thatValToSearch
is not working. However the issue might be elsewhere in your code, it's hard to tell with just two lines of code
– BackSlash
Nov 22 at 11:41
Im having problems with "+idaca+", if i replace it with 5, it works fine.. :/
– Eduardo Fernandes
Nov 22 at 11:42
please use some query builder eg stackoverflow.com/questions/5620985/…
– bato3
Nov 22 at 11:42
add space before this ANDidaca+"AND
– bato3
Nov 22 at 11:43
1
@EduardoFernandes Try to printquery1
by addingSystem.out.println("sql query --> "+query1);
– Jåcob
Nov 22 at 11:48
add a comment |
1
The ValToSearch is working fine, tho - If your query works when you manually type'%5%'
, it means thatValToSearch
is not working. However the issue might be elsewhere in your code, it's hard to tell with just two lines of code
– BackSlash
Nov 22 at 11:41
Im having problems with "+idaca+", if i replace it with 5, it works fine.. :/
– Eduardo Fernandes
Nov 22 at 11:42
please use some query builder eg stackoverflow.com/questions/5620985/…
– bato3
Nov 22 at 11:42
add space before this ANDidaca+"AND
– bato3
Nov 22 at 11:43
1
@EduardoFernandes Try to printquery1
by addingSystem.out.println("sql query --> "+query1);
– Jåcob
Nov 22 at 11:48
1
1
The ValToSearch is working fine, tho - If your query works when you manually type
'%5%'
, it means that ValToSearch
is not working. However the issue might be elsewhere in your code, it's hard to tell with just two lines of code– BackSlash
Nov 22 at 11:41
The ValToSearch is working fine, tho - If your query works when you manually type
'%5%'
, it means that ValToSearch
is not working. However the issue might be elsewhere in your code, it's hard to tell with just two lines of code– BackSlash
Nov 22 at 11:41
Im having problems with "+idaca+", if i replace it with 5, it works fine.. :/
– Eduardo Fernandes
Nov 22 at 11:42
Im having problems with "+idaca+", if i replace it with 5, it works fine.. :/
– Eduardo Fernandes
Nov 22 at 11:42
please use some query builder eg stackoverflow.com/questions/5620985/…
– bato3
Nov 22 at 11:42
please use some query builder eg stackoverflow.com/questions/5620985/…
– bato3
Nov 22 at 11:42
add space before this AND
idaca+"AND
– bato3
Nov 22 at 11:43
add space before this AND
idaca+"AND
– bato3
Nov 22 at 11:43
1
1
@EduardoFernandes Try to print
query1
by adding System.out.println("sql query --> "+query1);
– Jåcob
Nov 22 at 11:48
@EduardoFernandes Try to print
query1
by adding System.out.println("sql query --> "+query1);
– Jåcob
Nov 22 at 11:48
add a comment |
2 Answers
2
active
oldest
votes
up vote
4
down vote
Put an space before AND h.Id_Tecnologia
. That should solve your problem.
2
The error message you get from the database would have probably pointed at that problem. Always look at error messages. Make sure your program prints them (not justtry/catch/ignore
). Make sure to include them in Stackoverflow questions.
– Thilo
Nov 22 at 11:44
There is no error message, thats the problem, it doesnt return anything
– Eduardo Fernandes
Nov 22 at 11:46
Edited answer, but still no results :/
– Eduardo Fernandes
Nov 22 at 11:49
do you use error handling like this docs.oracle.com/javase/tutorial/jdbc/basics/sqlexception.html
– bato3
Nov 22 at 11:50
I do, updated the code
– Eduardo Fernandes
Nov 22 at 12:12
|
show 1 more comment
up vote
0
down vote
You are not afraid that in ValToSearch
you get something like ' OR 1 IN (DELETE * FROM Tecnologias )
?
Use parametr escaping or better some query builder
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
4
down vote
Put an space before AND h.Id_Tecnologia
. That should solve your problem.
2
The error message you get from the database would have probably pointed at that problem. Always look at error messages. Make sure your program prints them (not justtry/catch/ignore
). Make sure to include them in Stackoverflow questions.
– Thilo
Nov 22 at 11:44
There is no error message, thats the problem, it doesnt return anything
– Eduardo Fernandes
Nov 22 at 11:46
Edited answer, but still no results :/
– Eduardo Fernandes
Nov 22 at 11:49
do you use error handling like this docs.oracle.com/javase/tutorial/jdbc/basics/sqlexception.html
– bato3
Nov 22 at 11:50
I do, updated the code
– Eduardo Fernandes
Nov 22 at 12:12
|
show 1 more comment
up vote
4
down vote
Put an space before AND h.Id_Tecnologia
. That should solve your problem.
2
The error message you get from the database would have probably pointed at that problem. Always look at error messages. Make sure your program prints them (not justtry/catch/ignore
). Make sure to include them in Stackoverflow questions.
– Thilo
Nov 22 at 11:44
There is no error message, thats the problem, it doesnt return anything
– Eduardo Fernandes
Nov 22 at 11:46
Edited answer, but still no results :/
– Eduardo Fernandes
Nov 22 at 11:49
do you use error handling like this docs.oracle.com/javase/tutorial/jdbc/basics/sqlexception.html
– bato3
Nov 22 at 11:50
I do, updated the code
– Eduardo Fernandes
Nov 22 at 12:12
|
show 1 more comment
up vote
4
down vote
up vote
4
down vote
Put an space before AND h.Id_Tecnologia
. That should solve your problem.
Put an space before AND h.Id_Tecnologia
. That should solve your problem.
answered Nov 22 at 11:42
Rafael Palomino
332213
332213
2
The error message you get from the database would have probably pointed at that problem. Always look at error messages. Make sure your program prints them (not justtry/catch/ignore
). Make sure to include them in Stackoverflow questions.
– Thilo
Nov 22 at 11:44
There is no error message, thats the problem, it doesnt return anything
– Eduardo Fernandes
Nov 22 at 11:46
Edited answer, but still no results :/
– Eduardo Fernandes
Nov 22 at 11:49
do you use error handling like this docs.oracle.com/javase/tutorial/jdbc/basics/sqlexception.html
– bato3
Nov 22 at 11:50
I do, updated the code
– Eduardo Fernandes
Nov 22 at 12:12
|
show 1 more comment
2
The error message you get from the database would have probably pointed at that problem. Always look at error messages. Make sure your program prints them (not justtry/catch/ignore
). Make sure to include them in Stackoverflow questions.
– Thilo
Nov 22 at 11:44
There is no error message, thats the problem, it doesnt return anything
– Eduardo Fernandes
Nov 22 at 11:46
Edited answer, but still no results :/
– Eduardo Fernandes
Nov 22 at 11:49
do you use error handling like this docs.oracle.com/javase/tutorial/jdbc/basics/sqlexception.html
– bato3
Nov 22 at 11:50
I do, updated the code
– Eduardo Fernandes
Nov 22 at 12:12
2
2
The error message you get from the database would have probably pointed at that problem. Always look at error messages. Make sure your program prints them (not just
try/catch/ignore
). Make sure to include them in Stackoverflow questions.– Thilo
Nov 22 at 11:44
The error message you get from the database would have probably pointed at that problem. Always look at error messages. Make sure your program prints them (not just
try/catch/ignore
). Make sure to include them in Stackoverflow questions.– Thilo
Nov 22 at 11:44
There is no error message, thats the problem, it doesnt return anything
– Eduardo Fernandes
Nov 22 at 11:46
There is no error message, thats the problem, it doesnt return anything
– Eduardo Fernandes
Nov 22 at 11:46
Edited answer, but still no results :/
– Eduardo Fernandes
Nov 22 at 11:49
Edited answer, but still no results :/
– Eduardo Fernandes
Nov 22 at 11:49
do you use error handling like this docs.oracle.com/javase/tutorial/jdbc/basics/sqlexception.html
– bato3
Nov 22 at 11:50
do you use error handling like this docs.oracle.com/javase/tutorial/jdbc/basics/sqlexception.html
– bato3
Nov 22 at 11:50
I do, updated the code
– Eduardo Fernandes
Nov 22 at 12:12
I do, updated the code
– Eduardo Fernandes
Nov 22 at 12:12
|
show 1 more comment
up vote
0
down vote
You are not afraid that in ValToSearch
you get something like ' OR 1 IN (DELETE * FROM Tecnologias )
?
Use parametr escaping or better some query builder
add a comment |
up vote
0
down vote
You are not afraid that in ValToSearch
you get something like ' OR 1 IN (DELETE * FROM Tecnologias )
?
Use parametr escaping or better some query builder
add a comment |
up vote
0
down vote
up vote
0
down vote
You are not afraid that in ValToSearch
you get something like ' OR 1 IN (DELETE * FROM Tecnologias )
?
Use parametr escaping or better some query builder
You are not afraid that in ValToSearch
you get something like ' OR 1 IN (DELETE * FROM Tecnologias )
?
Use parametr escaping or better some query builder
answered Nov 22 at 11:48
bato3
850617
850617
add a comment |
add a comment |
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1
The ValToSearch is working fine, tho - If your query works when you manually type
'%5%'
, it means thatValToSearch
is not working. However the issue might be elsewhere in your code, it's hard to tell with just two lines of code– BackSlash
Nov 22 at 11:41
Im having problems with "+idaca+", if i replace it with 5, it works fine.. :/
– Eduardo Fernandes
Nov 22 at 11:42
please use some query builder eg stackoverflow.com/questions/5620985/…
– bato3
Nov 22 at 11:42
add space before this AND
idaca+"AND
– bato3
Nov 22 at 11:43
1
@EduardoFernandes Try to print
query1
by addingSystem.out.println("sql query --> "+query1);
– Jåcob
Nov 22 at 11:48