SQL Copy SELECT [ ALL | DISTINCT ] [ topSubclause ] aliasedExpr [{ , aliasedExpr }] FROM fromClause [ WHERE whereClause ] [ GROUP BY groupByClause [ HAVING havingClause ] ] [ ORDER BY orderByClause ] -- or SELECT VALUE [ ALL | DISTINCT ] [ topSubclause ] expr FROM fromClause...
我们现在有一张表titles，共有4个字段，分别是emp_no(员工编号)，title(职位)，from_date(起始时间)...
For ages we couldn't find a way to do this without building up the SQL in a string using the parameter and then executing it e.g. something horrible like 'SELECT TOP ' + CAST(@MaxRows AS varchar(10)) + '...'Now it turns out you are supposed to put the value used by the TOP...
SQL USEAdventureWorks2022; GOSELECTName, ProductNumber, ListPriceASPriceFROMProduction.ProductORDERBYNameASC; GO This example returns only the rows forProductthat have a product line ofRand that have days to manufacture that is less than4.
在表中，可能会包含重复值。这并不成问题，不过，有时您也许希望仅仅列出不同（distinct）的值。
Inserting Rows by Using INSERT and Values Inserting Rows by Using INSERT and SELECT Subqueries Inserting Rows by Using SELECT INTO Limiting Inserted Rows by Using TOP Adding a Row by Using a Result Set Position Adding ntext, text, or image Data to Inserted Rows ...
predicate下列谓词之一:ALL、DISTINCT、DISTINCTROW 或 TOP。 使用谓词可限制返回的记录数。 如果没有指定谓词,则默认值为 ALL。 *指定选择指定表中的所有字段。 table表的名称,该表包含从中选择记录的字段。 field1,field2字段名,这些字段包含了要检索的数据。 如果包括多个字段,将按它们的排列顺序对其进行检索。
One of these is the presence of TOP 100 PERCENT or perhaps written as TOP (100) PERCENT in SELECT queries. Almost always, we see this in the definition of views. In SQL Server, a view is basically just a SELECT statement that's been given a name. ...
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SELECT[ALL|DISTINCT|DISTINCTROW][HIGH_PRIORITY][STRAIGHT_JOIN][SQL_SMALL_RESULT][SQL_BIG_RESULT][SQL_BUFFER_RESULT][SQL_NO_CACHE][SQL_CALC_FOUND_ROWS]select_expr[,select_expr]...[into_option][FROMtable_references[PARTITIONpartition_list]][WHEREwhere_condition][GROUPBY{col_name|expr|position},...