JDBC select query with join and like fails - select

Question

I am trying to search the data in two tables by getting the last four numbers of a SSN as input from the user.
I have a JDBC query that is as follows:
`String sql = "SELECT N.NUMBER,N.LAST_NAME,N.FIRST_NAME,M.SSN,M.SEX,M.BIRTH_DATE"
+"FROM" +" G.M_NAME_A N, G.M_ID_A M"
+"WHERE" + "N.NUMBER = M.NUMBER"
+"AND" + "M.SSN like 'l4ssn' ";'
It fails with either "FROM Keyword not found where expected" or "Invalid Column index".
Please help me format the query.

Answer 1

yes, it should fail. Check your SQL, you're missing a space in front of "FROM", and ditto most anywhere you're concatenating strings.

Answer 2

1、Change the SQL as follows. Space is added around FROM, WHERE and AND，If you follow what you write sql, sql stitching is so out：
String sql = "SELECT N.NUMBER,N.LAST_NAME,N.FIRST_NAME,M.SSN,M.SEX,M.BIRTH_DATEFROM G.M_NAME_A N, G.M_ID_A MWHEREN.NUMBER = M.NUMBERAND M.SSN like 'l4ssn' ";
String sql = "SELECT N.NUMBER,N.LAST_NAME,N.FIRST_NAME,M.SSN,M.SEX,M.BIRTH_DATE"
+" FROM G.M_NAME_A N, G.M_ID_A M"
+" WHERE N.NUMBER = M.NUMBER"
-- modify +" AND" + "M.SSN like 'l4ssn' ";'
+" AND M.SSN like '%l4ssn%' ";

Answer 3

Change the SQL as follows. Space is added around FROM, WHERE and AND
String sql = "SELECT N.NUMBER,N.LAST_NAME,N.FIRST_NAME,M.SSN,M.SEX,M.BIRTH_DATE"
+" FROM " +" G.M_NAME_A N, G.M_ID_A M"
+" WHERE " + "N.NUMBER = M.NUMBER"
+" AND " + "M.SSN like 'l4ssn' ";
Your query will look for M.SSN which is 14ssn it's just like saying M.SSN = '14ssn'. If you want to use query something similar to 14ssn use M.SSN like '%14ssn%' instead
Just on side note, use prepared statement instead of using the query parameter in your sql string.
http://docs.oracle.com/javase/tutorial/jdbc/basics/prepared.html

Answer 4

Try this query
String sql=" SELECT N.NUMBER,N.LAST_NAME,N.FIRST_NAME,M.SSN,M.SEX,M.BIRTH_DATE "+
" FROM G.M_NAME_A N,G.M_ID_A M "+
" WHERE N.NUMBER = M.NUMBER "+
" AND M.SSN like 'l4ssn' ";

Answer 5

The question is resolved using the following query and PreparedStatement:
String l4ssn=("%"+l4ssn);
String sql = "SELECT N.NUMBER,N.LAST_NAME,N.FIRST_NAME,M.SSN,M.SEX,M.BIRTH_DATE"
+" FROM " +" G.M_NAME_A N, G.M_ID_A M"
+" WHERE " + "N.NUMBER = M.NUMBER"
+" AND " + "M.SSN like ?";
PreparedStatement pstmt = new PreparedStatement(sql);
pstmt.setString(1,l4ssn);