我有以下查询返回0结果,我知道这是错误的。但不知道什么是我的语法。 select * from SJT_USER where SJT_USER_NAME in
(select USER_NAME from NON_MEMBER);
SJT_USER_NAME型NCHAR(255 CHAR) USER_NAME型NVARCHAR2(255 CHAR) 我猜我需要做的NVARCHAR2为
我正在使用sqlite数据库。 该表为: ID_TABLE POINTS_A_TABLE POINTS_B_TABLE
id number id_a points_a id_a points_a
-------------- ---------------- ----------------
smith 1 smith 11 ...
gordon 22
这工作: Dim stSQL as String = "Select ID From Table Where COL Is Null"
Dim cmd As New OracleCommand
cmd.Connection = ...
cmd.CommandText = stSQL
cmd.BindByName = True
Try
Dim oRet As Obje
我在寻找最佳性能查询来获取关联中不同枚举的计数。 看看下面的SQL CREATE TYPE ITEM_TYPE AS ENUM ('coming', 'new', 'archive');
CREATE TABLE centers
(
id SERIAL PRIMARY KEY,
name TEXT NOT NULL,
created_at timestamp wi