[DECLAREdeclarations ]BEGINstatements EXCEPTIONWHENcondition[ORcondition... ]THENhandler_statements [WHENcondition[ORcondition... ]THENhandler_statements ... ]END; 1)If no error occurs, this form of block simply executes all the statements, and then control passes to the next statement after END....
DECLARE STATEMENT文を使用してSQL文またはPL/SQLブロックの識別子を宣言する必要があるのは、その識別子を参照するDECLARE CURSOR文の埋込みSQLプログラム内での位置が、文またはブロックを解析して識別子と対応付けるPREPARE文よりも物理的に(論理的ではなく)前になっているときのみです。 文の宣言...
The DECLARE GLOBAL TEMPORARY TABLE statement defines a declared temporary table for the current application process. The declared temporary table resides in the work file database and its description does not appear in the system catalog. It is not persi
CREATE FUNCTION dbo.ISOweek (@DATE DATETIME) RETURNS INT WITH EXECUTE AS CALLER AS BEGIN DECLARE @ISOweek INT; SET @ISOweek = DATEPART(wk, @DATE) + 1 - DATEPART(wk, CAST(DATEPART(yy, @DATE) AS CHAR(4)) + '0104'); --Special cases: Jan 1-3 may belong to the previous year IF...
Microsoft SQL Server 将保留关键字用于定义、操作和访问数据库。保留关键字是 SQL Server 使用的 Transact-SQL 语言语法的一部分,用于分析和理解 Transact-SQL 语句和批处理。尽管在 Transact-SQL 脚本中使用 SQL Server 保留关键字作为标识符和对象名在语法上是可行的,但规定只能使用分隔标识符。
DeclareTableStatement初始化 DeclareTableStatement 類別的新執行個體。 回頁首 屬性 展開資料表 回頁首 方法 回頁首 執行緒安全 這個型別的任何 Public static (在 Visual Basic 中為 Shared) 成員都具備執行緒安全。並非所有的執行個體成員都是安全執行緒。
DeclareVariableStatement Class Reference Feedback Definition Namespace: Microsoft.SqlServer.TransactSql.ScriptDom Assembly: Microsoft.SqlServer.TransactSql.ScriptDom.dll Package: Microsoft.SqlServer.TransactSql.ScriptDom v161.8901.0 This statement represents declare @variable stateme...
EXEC SQL END DECLARESECTION; intmain() { EXEC SQL CONNECT :conn_str; // 后续操作... } 三、ALLOCATE DESCRIPTOR实战 基础使用场景 c EXEC SQL ALLOCATE DESCRIPTOR sql_descriptor WITH MAX10; // 绑定查询结果到描述符 EXEC SQL SELECT id, name INTO :sql_descriptor FROM users WHERE status='ACTIVE...
Consider one example where we will declare one variable named @wishes that won’t have any initial value and will have a varchar data type. We will assign the value string ‘Hey! Good Morning My Friend! Learn SQL on EDUCBA with payal.’ to the @wishes variable using the SET statement in...
CASE can also be used in a SET statement, to assign a value to a variable: SET DATEFIRST 1DECLARE @isitfridayyet VARCHAR(100SET @isitfridayyet=CASE WHENDATEPART(WEEKDAY,GETDATE())=5 THEN'It''s Friday!'ELSE'It''s not yet Friday...'END ...