1 SELECT COUNT(1) FROM (SELECT a.id AS "id", a.district AS "district", a.company AS "company", a.type AS "type", a.cargo AS "cargo", a.goods AS "goods", a.weight AS "weight", a.status A
java.sql.SQLSyntaxErrorException: ORA-00904: "column": 标识符无效 首先查看无效的列是不是orcale关键字 , 如果不是 , 查看与column字段相关的所有内容 , 引用是否正确 尽量不要用select 中的字段别名当做 where 或者 order by 等的条件 应该使用表的别名或者表名作为标识 , 避免歧义 select user_id as id ,name as na from table tb where tb.n
如Oracle 数据库下报错: create table db_meta_web.user (id varchar2(255 char) not null, account varchar2(255 char), department varchar2(255 char), email varchar2(255 char), mobile varchar2(255 char), name varchar2(255 char), password varchar2(255 char), prima
新建oracle的database link时,提示错误“ORA-12169: TNS: 指定为连接标识符的 Net 服务名太长”, 网上查了下,是因为目标oracle是集群,连接字符串过长,超过255个字符,而造成的错误.由此更改. The maximum length of a net service name is 255 bytes; this limit has been exceeded. 缩减成这种格式,把多余的空格都给去了吧: (DESCRIPTION = (ADDRESS
SELECT LISTAGG(GOODSNAME,';') WITHIN GROUP (ORDER BY GOODSNAME) AS sd WM_CONCAT() 方法被替代成:LISTAGG(GOODSNAME,';') WITHIN GROUP (ORDER BY GOODSNAME) AS sd
131. Which view would you use to display the column names and DEFAULT valuesfor a table?A. DBA_TABLESB. DBA_COLUMNSC. USER_COLUMNSD. USER_TAB_COLUMNSAnswer: DSELECT COLUMN_NAME,DECODE(DATA_TYPE,'DATE' , DATA_TYPE ,'NUMBER' , DATA_TYPE ||DECODE(DATA_S
1. You need to load information about new customers from the NEW_CUST table into the tables CUST and CUST_SPECIAL. If a new customer has a credit limit greater than 10,000, then the details have to be inserted into CUST_SPECIAL. All new customer deta