仅创建表语句中的第一个表

Question

“凭据”表确实显示在 adb shell 中。我查了logcat，好像没有报问题……

   private static final String DATABASE_CREATE =
        "create table credentials (_id integer primary key autoincrement, "
                + "username text not null, password text not null, "
                + "lastupdate text);"
      + "create table user (_id integer primary key autoincrement, "
                + "firstname text not null, "
                + "lastname text not null);"
      + "create table phone (_phoneid integer primary key autoincrement, "
                + "userid integer not null, phonetype text not null, "
                + "phonenumber text not null);"
      + "create table email (_emailid integer primary key autoincrement, "
                + "userid integer not null, emailtype text not null, "
                + "emailaddress text not null);"
      + "create table address (_addressid integer primary key autoincrement,"
                + "userid integer not null, addresstype text not null, "
                + "address text not null);"
      + "create table instantmessaging (_imid integer primary key autoincrement, "
                + "userid integer not null, imtype text not null, "
                + "imaccount text not null);";

我一直在为此倾注，我敢打赌它是一些愚蠢的语法错字！或者，至少我希望它是微不足道的;-)

Answer 1

我想你正在使用：

yourDB.execSQL("your statement");

如果是这样，谷歌文档会提到这一点：

执行单个 SQL 语句 不是查询。例如，创建 TABLE、DELETE、INSERT 等多个 ;s 分隔的语句不是 支持的。它需要一个写锁

因此，您必须将每个 create table 语句分段并为每个表重复查询。

Answer 2

如果我没记错的话，我遇到了类似的问题，发现每次调用execSQL() 或类似方法只执行一条语句。任何额外的语句都会被忽略。

尝试将每个语句分成单独的字符串并分别执行，而不是单个字符串和单个调用。

例如：

private static final String TABLE_1 =
    "create table credentials (_id integer primary key autoincrement, "
    + "username text not null, password text not null, "
    + "lastupdate text);";

private static final String TABLE_2 =
    "create table user (_id integer primary key autoincrement, "
    + "firstname text not null, "
    + "lastname text not null);";

private static final String TABLE_3 =
    "create table phone (_phoneid integer primary key autoincrement, "
    + "userid integer not null, phonetype text not null, "
    + "phonenumber text not null);";

private static final String TABLE_4 =
    "create table email (_emailid integer primary key autoincrement, "
    + "userid integer not null, emailtype text not null, "
    + "emailaddress text not null);";

private static final String TABLE_5 =
    "create table address (_addressid integer primary key autoincrement,"
    + "userid integer not null, addresstype text not null, "
    + "address text not null);";

private static final String TABLE_6 = 
    "create table instantmessaging (_imid integer primary key autoincrement, "
    + "userid integer not null, imtype text not null, "
    + "imaccount text not null);";

public void createTables(){
    db.execSQL(TABLE_1);
    db.execSQL(TABLE_2);
    db.execSQL(TABLE_3);
    db.execSQL(TABLE_4);
    db.execSQL(TABLE_5);
}
 db.execSQL(TABLE_6);

Answer 3

在每个 Create Table 语句之后放置 Go

更新脚本

private static final String DATABASE_CREATE =
        "create table credentials (_id integer primary key autoincrement, "
                + "username text not null, password text not null, "
                + "lastupdate text); Go;"
      + "create table user (_id integer primary key autoincrement, "
                + "firstname text not null, "
                + "lastname text not null); Go;"
      + "create table phone (_phoneid integer primary key autoincrement, "
                + "userid integer not null, phonetype text not null, "
                + "phonenumber text not null); Go;"
      + "create table email (_emailid integer primary key autoincrement, "
                + "userid integer not null, emailtype text not null, "
                + "emailaddress text not null) Go;;"
      + "create table address (_addressid integer primary key autoincrement,"
                + "userid integer not null, addresstype text not null, "
                + "address text not null); Go;"
      + "create table instantmessaging (_imid integer primary key autoincrement, "
                + "userid integer not null, imtype text not null, "
                + "imaccount text not null); Go;";