帮助使用SELECT语句中的JOIN。

I am trying to join TABLE_1 and TABLE_2, I need to use every one of these fields in my HTML table. I am getting an error about my FROM clause, but I believe there are more errors involved.

我正在尝试连接TABLE_1和TABLE_2，我需要在我的HTML表中使用这些字段中的每一个。我从子句中得到一个错误，但是我相信会有更多的错误。

                           "SELECT "
                            + "TABLE_1.id, "
                            + "TABLE_1.date, "
                            + "TABLE_1.location, "
                            + "TABLE_1.name, "
                            + "TABLE_1.status "
                            + "TABLE_2.date, "
                            + "TABLE_2.location, "
                            + "TABLE_2.name, "
                            + "TABLE_2.type "
                         + "FROM SCHEMA_1.TABLE_1 JOIN SCHEMA_1.TABLE_2 "
                         + "WHERE TABLE_1.id = TABLE_2.id "
                         + "AND add_user = ?");

3 个解决方案

#1

Try this, instead:

试试这个,而不是:

                       "SELECT "
                        + "TABLE_1.id, "
                        + "TABLE_1.date, "
                        + "TABLE_1.location, "
                        + "TABLE_1.name, "
                        + "TABLE_1.status "
                        + "TABLE_2.date, "
                        + "TABLE_2.location, "
                        + "TABLE_2.name, "
                        + "TABLE_2.type "
                     + "FROM "
                     + "  SCHEMA_1.TABLE_1 JOIN SCHEMA_1.TABLE_2 "
                     + "  ON TABLE_1.ID = TABLE_2.ID"
                     + "WHERE add_user = ?");

#2

Change the WHERE TABLE_1.id = TABLE_2.id AND add_user = ? for ON TABLE_1.id = TABLE_2.id WHERE add_user = ?

改变TABLE_1的地方。id = TABLE_2。id和add_user = ?在TABLE_1。id = TABLE_2。add_user = ?

#3

Join the tables by ON not where

不要在什么地方加入表格。

http://www.w3schools.com/sql/sql_join_inner.asp

#1