sql语句子查询中a那显示语法错误，我没看出来，请各位大神帮忙看看

Question

string dbPath = @"D:\历年高考分数.db";
            string sq = @"Data Source=" + dbPath;
            m = new SQLiteConnection(sq);
            m.Open();
            SQLiteDataAdapter mAdapter = new SQLiteDataAdapter("select ('select yxlc,gzl from 表1 where gzl=('a'+'b'+'c')') from 表2",m);

a = comboBox1.Text;
b = comboBox2.Text;
c = comboBox3.Text;（下拉框选的内容）
图一是表1的内容，图二是表2的内容，图三是出错的地方

Answer 1

你的sql根本不对啊
a b c定义成string
string s = a + b+ c;
SQLiteDataAdapter mAdapter = new SQLiteDataAdapter("select yxlc,gzl from 表1 where gzl='" + s + "'",m);