SQL复制 -- Create a variable with a default>DECLAREVARIABLEmyvarINTDEFAULT5; >VALUES(myvar); 5-- Setting a variable>SETVARmyvar = (SELECTsum(c1)FROMVALUES(1), (2)AST(c1); >VALUES(myvar); 3-- Variables are the outermost scope.>SELECTmyvar, t.myvar, session.myvarFROMVALUES(1)AST(myvar...
If expression includes a subqueryDatabricksraises aINVALID_DEFAULT_VALUE.SUBQUERY_EXPRESSIONerror. Examples SQL -- Create a variable with a default >DECLAREVARIABLE myvarINTDEFAULT5; >VALUES(myvar); 5 -- Setting a variable >SETVAR myvar=(SELECTsum(c1)FROMVALUES(1),(2)AST(c1); >VALUES(myva...
可以在临时视图和 SQL 函数的主体中引用变量。 引用临时视图或临时 SQL 函数时,将使用其正文中任何变量的当前值。 IDENTIFIER 子句接受变量作为参数。 这样,您可以使用变量以及用于设置这些变量的查询结果来参数化标识符。 例子 SQL复制 -- A verbose definition of a temporary variable>DECLAREORREPLACEVARIABLEmyvarIN...
DECLARE VARIABLE DROP CATALOG DROP CONNECTION DROP CREDENTIAL DROP DATABASE DROP FUNCTION 投遞地點 DROP PROVIDER DROP RECIPIENT DROP SCHEMA DROP SHARE DROP TABLE DROP VARIABLE DROP VIEW DROP VOLUME REFRESH FOREIGN(CATALOG、SCHEMA或 TABLE) REFRESH(MATERIALIZED VIEW 或 STREAMING TABLE) REPAIR TABLE TRUNCATE...
SQL >SELECTspark_partition_id(), t.*FROMrange(5)ASt; 3 0 6 1 9 2 12 3 15 4 >SELECT*FROMrange(-3,0); -3 -2 -1 >SELECTspark_partition_id(), t.*FROMrange(0,-5,-1,2)ASt; 0 0 0 -1 1 -2 1 -3 1 -4 相關函式 ...
SQL > DECLARE VARIABLE myvar1 INT DEFAULT 7; > DECLARE VARIABLE myvar2 STRING DEFAULT ‘hello’; -- Set a SQL variable to a value > SET VAR myvar1 = 5; > VALUES (myvar1); 5 -- Set a SQL variable back to DEFAULT > SET VARIABLE myvar1 = DEFAULT; > VALUES (myvar1); 7 -...
SQL >DECLAREVARIABLE myvar1INTDEFAULT7; >DECLAREVARIABLE myvar2 STRINGDEFAULT‘hello’; -- Set a SQL variable to a value >SETVAR myvar1=5; >VALUES(myvar1); 5 -- Set a SQL variable to a value inside of a compound statement
DECLARE @qty INT -- initialize the variable at 0: SELECT @qty = 0 SELECT @qty = MAX(qty) FROM sales WHERE book_id = @book_id /* If there are no books sold for book_id specified ** then return 0: */ RETURN ISNULL(@qty, 0) ...
SQL DECLAREVARIABLEmyvar1INTDEFAULT7;SETVARmyvar1 =5;VALUES(myvar1); 使用SQL 的限制資料存取權 儀表板資料集中的所有資料都可以供儀表板檢視人員存取,即使資料未顯示在視覺效果中。 若要防止敏感性資料傳送至瀏覽器,請限制定義資料集之 SQL 查詢中指定的資料行。 例如,請勿從資料表選取所有資料行,而是只選擇...
SQL 복사 -- A self-contained execution using a literal string > EXECUTE IMMEDIATE 'SELECT SUM(c1) FROM VALUES(?), (?) AS t(c1)' USING 5, 6; 11 -- A SQL string composed in a SQL variable > DECLARE sqlStr = 'SELECT SUM(c1) FROM VALUES(?), (?) AS t(c1)'; > DECLAR...