This is the complete query I am using below. Hbm_Matter will only 1 have unique record(matter_uno). How do I get multiple records returned in my query when there are 2 records in the subquery? select matter_uno,
INUse IN in a WHERE clause to verify that a value in the current row of the main query is part of the set that the subquery returns. You can also preface IN with NOT, to verify that a value in the current row of the main query is not part o...
SQL Server sees column id1 and says "yes I have that it is in the TestTable1 table, I can use that" What can we do? Use EXISTS because you will get an error instead of a wrong resultset SELECT * FROM t1 WHERE EXISTS(SELECT *FROM TestTable2 t2WHERE t2.id2 = t1.id1) id1 1...
The %EffDtCheck construct expands into an effective date subquery suitable for a Where clause. The value foras_of_dateis automatically wrapped in %DateIn unlessas_of_dateis already wrapped in %DateIn or refers to other database columns. EffDtCheck构造扩展为适用于Where子句的有效日期子查询。as...
I can run the first part of this query using ...IN (1) instead of the subquery and get a row match. I can run just the subquery and get a row match. But together I get the error: --- SQL-query: Documentation SELECT FirstName FROM accounts WHERE id IN ( SELECT Acc...
Using the ALL Operator in Multiple-Row subqueries 解读:> ALL就相当于大于子查询中的最大值 < ALL就相当于小于子查询中的最小值 没有等于ALL ^^ All Keywords > ALL = ALL (逻辑上是混乱的,但是没有报错) Null Values in a Subquery SELECTemp.last_nameFROMemployees empWHEREemp.employee_idNOTIN(SELE...
7)、unique_subquery 一个索引查找函数,可以完全替换子查询,效率更高。 8)、index_sugquery 类似于unique_subquery。可以替换IN子查询,但只适合下列形式的子查询中的非唯一索引。 9)、range 只检索给定范围的行,使用一个索引来选择行。key列显示使用了哪个索引。key_len包含所使用索引的最长关键元素。在该类型中re...
ANSI SQL 1992 Standard, pg 191http://www.contrib.andrew.cmu.edu/~shadow/sql/sql1992.txt 3) Case: a) If the"*" is simply contained in a<subquery>that is immediately contained in an<exists predicate>, then theis equivalent to a<value expression>that is an arbitrary<literal>. 回答2 The...
With PROC SQL‟s subquery and remerging features, yes, you can.When working with categorical variables, often there is a need to add group descriptive statistics such as group counts, minimum and maximum values for further by-group processing. Instead of first creating the group count, ...
Cannot use an aggregate or a subquery in an expression used for the group by list of a GROUP BY clause. Cannot use the ROLLBACK statement within an INSERT-EXEC statement. Cant Drop Table capitalise the first letter of each word in a string in SQL Server. Capturing the results from exec ...