SELECT coalesce (item, 'all products') AS "Product", coalesce (year,'all years') AS "Year", SUM (quantity) as "Sales" FROM sales GROUP BY CUBE (item,year) ORDER BY item,year; GROUPING SETS ROLLUP is used to summarize the results at each level. The following query returns the tota...
// 动态生成 index 属性的值 generateIndex(index: number): string { return index === 0 ? '序...
Use the substring function to obtain the character string from the name field, group the student table according to the obtained character string, and return each sub character string and the number of records. insert into temp SELECT substring(name,6),count(name) FROM student GROUP BY substring...
Each expression may be composed of output columns or it may be an ordinal number selecting an output column by position (starting at one). TheORDER BYclause is evaluated after anyGROUP BYorHAVINGclause and before any OFFSET,LIMIT orFETCH FIRST clause. The default null ordering isNULLS LAST,...
. The output of such an item is the concatenation of the first row from each function, then the second row from each function, and so on. If some of the functions produce fewer rows than others, null values are used for the missing data. This way, the total number of rows returned ...
是指在SQL语句中使用了select查询语句,但查询结果的顺序与期望的不一致。这可能是由于以下原因导致的: 1. 未使用order by子句:在SQL语句中,如果没有使用order by子句来指定排...
For the WHERE clause, if special character "%", "_", or "\" is queried in LIKE, add the slash "\" before each character.GROUP BY clause Condenses query results into a single row all selected rows that share the same values for the grouped expressions. CUBE ( { expression | ( expre...
This clause implements SQL-driven Flashback, which lets you specify a different system change number or timestamp for each object in the select list. You can also implement session-level Flashback using theDBMS_FLASHBACKpackage. A Flashback Query lets you retrieve a history of changes made to...
Take tiles with numbers, each next number must be higher than previous. Girl strips for the player, who has longer! FuckThemAll If you remember the 15-puzzle (assemble tiles on the board), it will not be difficult for you to assemble FuckThemAll on the 12-cells. So what? - Fuck ...
Roll the dice and move - your score is the number of your steps. Try to... JackPool-7 3.9 / 5 Another sexy mix of Billiard and Black Jack. White balls on the table have values from 1 to 10. When two white balls touch each other, they merge and the value of the resulting ...