sqlite的空值查询怎么写,能者得分
sqlite的空值查询怎么写,能者得分
select * from tt where f1 is null
select * from yourTable where col is null;
SQL code:
sqlite> create table Aoqun (id int primary key,col1 int);
sqlite> insert into Aoqun values (1,10);
sqlite> insert into Aoqun values (2,null);
sqlite>
sqlite> select * from Aoqun;
1|10
2|
sqlite> select * from Aoqun where col1 is null;
2|
sqlite>
is null
相关问答：
C# code:
System.Data.SQLite.SQLiteConnection conn = new SQLiteConnection(@"acs.db");
try
{
conn.Open();
}
......
在 SQL SERVER 中的语句 是：
SELECT
(ROW_NUMBER() OVER (ORDER BY Name) - 1) / 4 + 1 AS TitleRow,
(ROW_NUMBER() OVER (ORDER BY Name) - 1) % 4 + 1 AS Title ......
我用sqliteadmin建了一个数据库test.sdb,可是怎么也打不开提示如下错误：File opened that is not a database file
file is encrypted or is not a database。
我的连接字符串如下楼上的可不可以帮我看看
S ......
程序代码如下：
sqlTime = "select SUM(onlineTimeSpan) from T_OnlineTimeSum where ipAddress = :a AND onlineDate BETWEEN :b AND :c";
......
大家好！
sqlite字段为float型的值怎样访问？
试过用sqlite3_column_double，确返回的数据不正确；
没用过,帮顶.
一样啊，返回全是 string
你的代码是什么？
double sqlite3_column_double(sqli ......
