Variables that are used in a block must generally be defined in the declaration section of the block unless they are global variables or package-level variables. A variable declaration consists of a name that is assigned to the variable and the data type of the variable. Optionally, the ...
Variable declaration #docslug#/ecob/ecob/V1.1.6/variable-declaration OceanBase Embedded SQL in C (ECOB) uses theDECLARE SECTIONstatement to declare the host variables. This is a special SQL statement of ECOB. Syntax: EXECSQLBEGINDECLARESECTION;...EXECSQLENDDECLARESECTION; Sample statement: EXEC...
Oracle NoSQL Databaseallows implicit declaration of internal variables as well. Internal variables are bound to their values during the execution of the expressions that declare them. Variables (internal and external) can be referenced in other expressions by their name. In fact, variable references...
(myvar); 1 1 3 >DROPTEMPORARYVARIABLEmyvar;-- A minimalist variable declaration>DECLAREmyvar =5; >VALUES(myvar); 5-- Using a variable with an IDENTIFIER clause>DECLAREcolnameSTRING; >SETVARcolname ='c1'; >SELECTIDENTIFIER(colname)FROMVALUES(1,2)AST(c1, c2); 1 >SETVARcolname ='c2'...
Transact-SQL reference for using DECLARE to define local variables for use in a batch or procedure.
DECLARE statement and are assigned values by using either a SET or SELECT statement. Cursor variables can be declared with this statement and used with other cursor-related statements. After declaration, all variables are initialized as NULL, unless a value is provided as part of the declaration....
DECLARE CONTINUE HANDLER FOR SQLSTATE'02000'SET done=1;--错误标记处理,放到最后再声明,要放到游标后面。--不然会报错:Variable or condition declaration after cursor or handler declaration DECLARE CONTINUE HANDLER FOR SQLEXCEPTION,SQLWARNING,NOT FOUNDset_err=1;--在开始循环之前修改数据,循环会使用新数据。
For more information about CLR user-defined types or alias data types, see CREATE TYPE (Transact-SQL). = value Assigns a value to the variable in-line. The value can be a constant or an expression, but it must either match the variable declaration type or be implicitly conv...
13.30 Explicit Cursor Declaration and Definition 13.31 Expression 13.32 FETCH Statement 13.33 FOR LOOP Statement 13.34 FORALL Statement 13.35 Formal Parameter Declaration 13.36 Function Declaration and Definition 13.37 GOTO Statement 13.38 IF Statement 13.39 Implicit Cursor Attribute 13.40 INLINE Pragma 13.41 In...
Defines thetabledata type. The table declaration includes column definitions, names, data types, and constraints. The only constraint types allowed are PRIMARY KEY, UNIQUE, NULL, and CHECK. An alias data type cannot be used as a column scalar data type if a rule or default definition is boun...