We can specify multiple statements as well with SQL IF statement and BEGIN END blocks. In the following query, we want to print a message from two print statements once a condition is satisfied. 我们也可以使用SQL IF语句
this statement is equivalent to nested IF...THEN...ELSE...IF...THEN statements, but only one END IF is needed. The following example uses an IF...THEN...ELSIF...ELSE statement to count the number of employees by compensation, in steps of $25,000. ...
ID || '.' || CURRENT_VALUE; --拼接查询字符串 QUERY_ITEMS := QUERY_ITEMS || ',' || CURRENT_VALUE; END IF; ELSE CONDITIONS := CONDITIONS || ' = ' || ALIAS || '.' || CURRENT_VALUE || ' '; END IF; --循环值减1 SIGNS := SIGNS - 1; END LOOP; --拼接关联SQL TARGET_...
The following example uses an if statement to check if a query returns any rows: do $$ declare selected_film film%rowtype; input_film_id film.film_id%type = 0; begin select * from film into selected_film where film_id = input_film_id; if not found then raise notice'The film % co...
Use the IF statement for control flow, which is unlike theIIf (MDX)function and theCASE Statement (MDX)that can only be used to return values or objects. Examples In the following example, the scope is restricted to the Country level of the Customers Geography hierarchy in the Customers dime...
[ELSE statement_list] END IF 5|0示例(leetcode 627.交换工资)给定一个 salary 表,如下所示,有 m = 男性 和 f = 女性 的值。交换所有的 f 和 m 值(例如,将所有 f 值更改为 m,反之亦然)。要求只使用一个更新(Update)语句,并且没有中间的临时表。
SQL 过程中的 IF 语句 可使用 IF 语句来根据条件满足状态而有条件进入某个逻辑。IF 语句在逻辑上等价于带有搜索式 CASE 语句 WHEN 子句的 CASE 语句。 IF 语句支持使用可选 ELSE IF 子句和缺省 ELSE 子句。END IF 子句是指示语句结尾所必需的。 以下是包含 IF 语句的过程的示例:...
SqlBackupRestoreMasterKeyStatement SqlBackupRestoreServiceMasterKeyStatement SqlBackupRestoreStatement SqlBackupRestoreTableStatement SqlBackupServiceMasterKeyStatement SqlBackupTableStatement SqlBatch SqlBatchCollection SqlBetweenBooleanExpression SqlBinaryBooleanExpression SqlBin...
The expression that is the predicate for the if statement. This should be a boolean expression. C# 複製 public Microsoft.SqlServer.TransactSql.ScriptDom.BooleanExpression Predicate { get; set; } Property Value BooleanExpression Applies to 產品版本 Microsoft.SQLServer.DacFx 140.3881.1, 150.18208...
Learn more about the Microsoft.SqlServer.Management.SqlParser.SqlCodeDom.SqlIfElseStatement.FalseStatement in the Microsoft.SqlServer.Management.SqlParser.SqlCodeDom namespace.