<table_source> | left_table_source { CROSS | OUTER } APPLY right_table_source | [ ( ] <joined_table> [ ) ] } <join_type> ::= [ INNER ] [ <join hint> ] JOIN | LEFT [ OUTER ] JOIN | RIGHT [ OUTER ] JOIN | FULL [ OUTER ] JOIN <join_hint> ::= REDUCE | REPLICATE |...
先在表tbl_user新增一个索引ALTERTABLEtbl_userADDindexi_aaa(user_name);,此时查看执行计划EXPLAINSELECT*FROMtbl_user_login_log tlLEFTJOINtbl_user tuONtl.user_name=tu.user_name;如下图 此时的联表算法就是INL,因为表tbl_user_login_log的user_name是无索引的,那么从表tbl_user_login_log取出的user_nam...
you cannot use a table variable with SELECT INTO or INSERT EXEC queries. f you are using a table variable in a join, you will need to alias the table in order to execute the
FROM@TableVarSalesOrderTableVariableINNERJOIN Sales.SalesOrderHeaderSONTableVariable.SOrderID=S.SalesOrderID DBCCTRACEOFF(2453) CHECK Constraints The check constraints are used to enable control of any condition when a row of data is inserted or modified. In addition to this, the check constraints ar...
使用CREATE EXTERNAL TABLE建立外部數據表。 location 使用LOCATION和ALTER TABLE的CREATE TABLE子句來設定數據表位置。 owner 使用[SET] OWNER TO和ALTER TABLE的ALTER VIEW語句來轉移表或檢視的擁有權。 SET 在 Databricks SQL 中可做為選擇性關鍵詞。 provider ...
If the column names are shared between the joined database tables and have the same case, then theouterjoinfunction adds a unique suffix to the corresponding variable names indata. The variables indatathat correspond to columns in the left table containNULLvalues when no matched rows exist in ...
DECLARE @DimCustomer_test TABLE ( [CustomerKey] [int] , [FirstName] [nvarchar](50) ,[MiddleName] [nvarchar](50) ,[LastName] [nvarchar](50) ) —insert data to @DimCustomer_test INSERT @DimCustomer_test ( [CustomerKey] , [FirstName] ...
DELTA_TABLE_LOCATION_MISMATCH、DELTA_UNSUPPORTED_TIME_TRAVEL_MULTIPLE_FORMATS、 INCOMPATIBLE_JOIN_TYPES、INVALID_JOIN_TYPE_FOR_JOINWITH、INVALID_LATERAL_JOIN_TYPE、INVALID_QUERY_MIXED_QUERY_PARAMETERS、INVALID_SINGLE_VARIANT_COLUMN、MANAGED_TABLE_WITH_CRED、MUTUALLY_EXCLUSIVE_CLAUSES、NON_LAST_MATCHED_CLAUSE...
移除OUTER JOIN 運算子或不要將表格函數置於巢狀明確結合中。 從程序定義的廣域變數或參數的預設子句中移除函數。 若為原因碼 1、2 及 3,則可使用共用表格表示式來重新撰寫查詢,以隔離表格函數呼叫。例如: SELECT c1 FROM (SELECT c1 FROM t1, t2, TABLE(tf1(t1.c1) AS tf), t3) AS x, t4 可以重...
a specific table pair, this join hint takes precedence in the joining of the two tables. The query hints, though, must still be honored. The join hint for the pair of tables might only restrict the selection of allowed join...