题目: 语句SELECT‘ACCP’FROM DUAL 的执行结果是() A ACCP B X C 编译错 D 提示未选中行 免费查看参考答案及解析 题目: 清水勤务面板上的Select电门的作用 A 选择加水的水箱 B 选择单个选箱的加水量 C 选择总的加水量 D 选择水箱供水顺序 免费查看参考答案及解析 题目: 5 语句 select 15/2 的执行...
108.有SQL文件test.sql,其内容为selectabs(-10)fromdual;select*fromdual;select123;mit;下面哪个SQL语句可打印并执行text.sql文件? A、zsql/assysdba-q-f-a\test.sqlB、zsql/assysdba-q-f\test.sqlC、zsql/assysdba-q-a-f\test.sqlD、zsqlgaussdba/Changeme_123127.0.0.1 免费查看参考答案及解析 ...
在没有 FROM 子句的情况下运行 SELECT 表达式查询可以帮助开发人员执行计算、检索系统函数或生成临时结果,而无需引用任何特定的表。...在这之前,如果想只是单纯的计算而不从表中获取数据,往往需要借用 DUAL 表来达到目的。现在可以跟 MySQL 或者 PostgreSQL 一样,直接省掉 From 子句了。...用途:Dual表最常见的...
-- -- Get Profile in current session -- SQL> SELECT DBMS_CLOUD_AI.get_profile() from dual; DBMS_CLOUD_AI.GET_PROFILE() --- "OPENAI" -- -- Use AI -- SQL> select ai how many customers exist; CUSTOMER_COUNT --- 55500 SQL> select ai how many customers in San Francisco are marri...
文章目录 示例 解释 一条select语句在MySQL中的奇幻之旅 示例 explain select * from emp; 解释 列(Column) 含义(Meaning) id The SELECT...:用于where中的in查询,完全替换子查询,效率更高。...语句为value IN (SELECT primary_key FROM single_table WHERE some_expr) index_subquery:子查询中的返回结果字段...
The main utility of C, a dimensionless coefficient, is therefore primarily in comparing different tasks, rather than in the meaning of the absolute number in itself, which is difficult to interpret on its own. For instance, the standard administration of the Cambridge Face Memory Test (CFMT) ...
a首先介绍了效率的含义,引申介绍技术效率、规模效率和纯技术效率的含义 First introduced the efficiency meaning, expands the introduction technology efficiency, the scale efficiency and the merely technical efficiency meaning[translate] a每当有了麻烦,他们总是依靠我们。 Whenever had the trouble, they always ...
SMS option to select one from Dual SIM Hello Apple support, i have installed dual sim on my iphone XR with esid. in case of sending sms, i dont see option of changing sim card for any sms to be sent. It by default takes the previously sent service provider carrier for sending any...
aDUAL INTERFACE 双界面[translate] acolorectal (Table 1). The length of time since chemotherapy or radiation ranged from 1[translate] aHave you in my very happy 正在翻译,请等待... [translate] aRECALCULATED 正在翻译,请等待... [translate] ...
aChat personally...什么意思 Chat personally…Any meaning[translate] a1870 年,轩尼诗创建 X。澳议员莫里斯 In 1870, the porch Nepal poem founded X.Australian Congressman Morris[translate] a每个人都对它很不舍 Each people all to its very not shed[translate] ...