因此,在实际生产中,要尽可能利用其他效率相对高的SQL来避免使用Not in Subquery。 虽然通过改写Not in Subquery的SQL,进行低效率的SQL到高效率的SQL过渡,能够避免上面所说的问题。但是这往往建立在我们发现任务执行慢甚至失败,然后排查任务中的SQL,发现"问题"SQL的前提下。那么如何在任务执行前,就"检查"出这样的
子查询合并时,没有校验两个 subquery 的投影项是否一致,SQL 的两个 subquery 的投影项是不同的,但是却做了子查询合并改写,误认为投影项是相同的,当做恒假的语句做了子查询合并改写导致结果为空。 SELECT x1 FROM t22 WHERE x1 IN (SELECT a.c1 FROM t11 a) AND x1 NOT IN (SELECT a.c2 FROM t11 a)...
首先看个Not in Subquery的SQL: // test_partition1 和 test_partition2为Hive外部分区表select * from test_partition1 t1 where t1.id not in (select id from test_partition2); 对应的完整的逻辑计划和物理计划为: == Parsed Logical Plan =='Project [*]+- 'Filter NOT 't1.id IN (list#3 [])...
问tdsql关联表更新报错do not support subquery/sum in update？问题已解决：A表和B表有分片tenant_cod...
where A.ID not in (SelectTop(30)AkteID from RW_RECH) " gives me a result which I expect. Is there any way to make the first SQL command work correctly? I get an empty result. This isnot expectedand thereforeincorrect. schumifrick, the empty resultis expectedand ther...
top-level query, not in subqueries. When a table hint is specified as a query hint, the hint can be specified in the top-level query or in a subquery. However, the value specified forexposed_object_namein theTABLE HINTclause must match exactly the exposed name in the query or subquery....
SCALAR_SUBQUERY_IS_IN_GROUP_BY_OR_AGGREGATE_FUNCTION SERVERLESS_BUDGET_POLICY_NOT_ENABLED SERVERLESS_BUDGET_POLICY_NOT_ENABLED_FOR_ACCOUNT SERVERLESS_NOT_AVAILABLE SERVERLESS_NOT_ENABLED SERVERLESS_NOT_ENABLED_FOR_USER SERVERLESS_NOT_ENABLED_FOR_WORKSPACE SINKS_NOT_SUPPORTED_IN_SEG STANDALONE_PRIVATE_MV...
3 [FROM subquery [AS] table_id] 4 [WHERE where_condition] 5 [GROUP BY {col_name | expr}, ... ] 6 [HAVING where_condition] 7 [ORDER BY {col_name | expr} [ASC | DESC], ...] 8 [LIMIT [offset,] row_count] 其中,where_condition 是一个执行结果为布尔值的条件表达式。不需要子...
The expression can't be a subquery or contain alias data types. Computed columns can be used in select lists, WHERE clauses, ORDER BY clauses, or any other locations in which regular expressions can be used, with the following exceptions: Computed columns must be marked PERSISTED to ...
SQL IN Operator With Subquery Suppose we only want the details of those customers who have placed an order. Here's how we can do that using a subquery. -- select only those customers who have placed an order-- the subquery is enclosed within parentheses after the IN keywordSELECTcustomer_...