Scenario 2.a: Delete Duplicate rows but keep one using CTE We need to use the technique of Self Join initially to check for duplicate records containing different custid but same passport number. select distinct a.* from customers2 a join customers2 b on a.custid <> b.custid and a.CustN...
处理重复行 当SQL 对 SELECT 语句进行求值时,根据满足 SELECT 语句的搜索条件的行数,可能有几行符合结果表中的条件。 结果表中的某些行可能重复。 您可以使用 DISTINCT 关键字指定不需要任何重复项,后跟表达式列表: SELECT DISTINCTJOB, SEX ... DISTINCT 表示您只想选择唯一行。 如果所选行与结果表中的另一行重...
ROW_NUMBER WF enumerates the rows. We can also use it to remove duplicate records with it. Or to take a random sample. As the name suggests WF can calculate statistics on a given window: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 sum(sales)OVER(PARTITIONBYCustomerIDBYtsROWSBETWEEN...
CREATE TABLE TestBatch (ColA INT PRIMARY KEY, ColB CHAR(3)); GO INSERT INTO TestBatch VALUES (1, 'aaa'); INSERT INTO TestBatch VALUES (2, 'bbb'); INSERT INTO TestBatch VALUES (1, 'ccc'); -- Duplicate key error. GO SELECT * FROM TestBatch; -- Returns rows 1 ...
重复的数据库(DUPLICATE_DATABASE) 42723 重复的函数(DUPLICATE_FUNCTION) 42P05 重复的预编译语句(DUPLICATE_PREPARED_STATEMENT) 42P06 重复的模式(DUPLICATE_SCHEMA) 42P07 重复的表(DUPLICATE_TABLE) 42712 重复的别名(DUPLICATE_ALIAS) 42710 重复的对象(DUPLICATE_OBJECT) 42702 模糊的字段(AMBIGUOUS_COLUMN) 427...
220 rows deleted. Other Methods You Might Come Across I’ve only found a few different ways for deleting duplicate data in SQL. I’ve listed a few more below, which don’t actually work as well as the others, if at all. I’ve added these so you can see if specific methods work, ...
182. Duplicate Emails[e] 一、表信息 二、题目信息 查询重复的邮箱 Write a SQL query to find all duplicate emails in a table named Person. For example, your query should return the following for the above table: 三、参考SQL 方法一:自己写的 ...
Recursive common table expression (CTE) allows duplicate column names.Recursive CTE doesn't allow duplicate column names. Disabled triggers are enabled if the triggers are altered.Altering a trigger doesn't change the state (enabled or disabled) of the trigger. ...
check permission for foreign table scan failed: failed to check permission:MaxCompute error,Authorization Failed [4019], You have NO privilege 'odps:Select' on {xxxxxxxxxx} 解决方法请参见MaxCompute权限相关。 ERRCODE_DUPLICATE_OBJECT already exist 存在重复的对象,通常发生于创建重复的Extension、Publication...
Specifies that the data file doesn't have duplicate entries. If the actual rows in the data file aren't sorted according to the order that is specified, or if the UNIQUE hint is specified and duplicates keys are present, an error is returned. Column aliases are required when ORDER is used...