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18 wrz 2013 · The WHERE clause is specifically designed to test conditions against raw data (individual rows of the table). However, MAX is an aggregate function over multiple rows of data. Basically, without a sub-select, the WHERE clause knows nothing about any rows in the table except for the current row.
25 sty 2021 · SELECT co.order_no, co.chg_order_no,co.line_no, co.amount FROM CHANGE_ORDER co WHERE co.chg_order_no = (select MAX(co2.chg_order_no) from CHANGE_ORDER co2 where co.order_no = co2.order_no ); Your version returns the maximum chg_order_no over all the data.
The Oracle MAX() function is an aggregate function that returns the maximum value of a set. The following illustrates the syntax of MAX() function: Similar to the MIN() function, the DISTINCT and ALL clauses are irrelevant to the MAX() function. The Oracle MAX() function also ignores NULL values.
The Oracle/PLSQL MAX function returns the maximum value of an expression. Syntax. The syntax for the MAX function in Oracle/PLSQL is: SELECT MAX(aggregate_expression) FROM tables. [WHERE conditions]; OR the syntax for the MAX function when grouping the results by one or more columns is: SELECT expression1, expression2, ... expression_n,
The MIN and MAX aggregate functions are used to calculate the minimum and maximum values of a set of data respectively. As aggregate functions they reduce the number of rows, hence the term "aggregate".
MAX returns maximum value of expr. You can use it as an aggregate or analytic function. See Also: "About SQL Expressions" for information on valid forms of expr, "Floating-Point Numbers" for information on binary-float comparison semantics, and "Aggregate Functions".
20 kwi 2024 · SQL MAX() with HAVING, WHERE, IN: How SQL HAVING CLAUSE can be used instead of where clause along with the SQL MAX function to find the maximum value of a column over each group and how SQL in operator can perform with max function.
