我还是个新手,这是我第一次使用这些多表查询。为什么我有这样的错误?这是我的代码:
String selectQuery =
" select *" +
" from tableassign left outer join\n" +
" tableacc\n" +
" on tableassign.signeeid = tableacc.userid left outer join\n" +
" tableinfo\n" +
" on tableassign.signeeid = tableinfo.userid left outer join\n" +
" WHERE tableassign.signeedepid =?";
Cursor data = db.rawQuery(selectQuery , new String[]{ signeedep });
错误:
android.database.sqlite.SQLiteException: near "WHERE": syntax error (code 1):
, while compiling: select * from tableassign left outer join tableacc on
tableassign.signeeid = tableacc.userid left outer join tableinfo on
tableassign.signeeid = tableinfo.userid left outer join WHERE
tableassign.signeedepid =?
您似乎有复制/粘贴问题。删除left outer join
之前的最后一个where
:
String selectQuery =
" select *" +
" from tableassign left outer join\n" +
" tableacc\n" +
" on tableassign.signeeid = tableacc.userid left outer join\n" +
" tableinfo\n" +
" on tableassign.signeeid = tableinfo.userid\n" +
" WHERE tableassign.signeedepid =?";
Cursor data = db.rawQuery(selectQuery , new String[]{ signeedep });
我会以不同的方式格式化它,主要是为了可读性:
String selectQuery =
" SELECT *\n" +
" FROM tableassign\n" +
" LEFT JOIN tableacc ON tableassign.signeeid = tableacc.userid\n" +
" LEFT JOIN tableinfo ON tableassign.signeeid = tableinfo.userid\n" +
" WHERE tableassign.signeedepid =?";
Cursor data = db.rawQuery(selectQuery , new String[]{ signeedep });
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我来说两句