问在IF子句Oracle中执行select语句ENMySQL作为互联网行业使用最多的关系型数据库之一，与其免费、开源的...
N_TABLE_NAME; END IF; --拼接建表语句 TARGET_RESULTS := 'CREATE TABLE ' || N_TABLE_NAME || ' AS '; --拼接查询项 TARGET_RESULTS := TARGET_RESULTS || 'SELECT ' || ALIAS || '.* '; --循环动态生成查询项 FOR TEMP IN DATA LOOP TARGET_RESULTS := TARGET_RESULTS || ',B' || ...
IF CONDITION THEN STATEMENT 1; ... STATEMENT N; END IF; 二、 IF-THEN-ELSE语句 IF CONDITION THEN STATEMENT 1; ELSE STATEMENT 2; END IF; 三、 ELSLF语句 IF CONDITION 1 THEN STATEMENT 1; ELSIF CONDITION 2 THEN STATEMENT 2; ELSIF CONDITION 3 THEN STATEMENT 3; ... ELSE STATEMENT N; --...
FromOracle Database 23ai, theautomatic SQL transpilercan extract SQL expressions in PL/SQL. These are then part of the SQL statement, so at runtime it's as-if the function doesn't exist! To do this, ensure thesql_transpilerparameter ison(it'soffby default). When a function in thewhe...
The following is example using the IF-THEN-ELSE statement in an Oracle function: CREATE OR REPLACE Function IncomeLevel ( name_in IN varchar2 ) RETURN varchar2 IS monthly_value number(6); ILevel varchar2(20); cursor c1 is SELECT monthly_income FROM employees WHERE name = name_in; BEGIN...
In Oracle PL/SQLyou cannot use a SELECT statement in the IF statement, so you have to execute the query as a standalone statement. Oracle: CREATEORREPLACEFUNCTIONfn_color_exists(p_nameVARCHAR2)RETURNCHARISv_cntNUMBER(10);BEGIN-- Execute the query as a standalone statementSELECTCOUNT(*)INTO...
Oracle PL/SQL PL SQL Operator LIKE Operator in IF statement Introduction The LIKE operator compares a character, string, or CLOB value to a pattern. It returns TRUE if the value matches the pattern and FALSE if it does not. The pattern can include the two wildcard characters underscore...
この式の値がTRUEの場合にのみ、THENの後の文が実行されます。 ELSE 制御がこのキーワードに達すると、その後の文が実行されます。 これは、boolean_expressionにTRUEの値がなかった場合に発生します。 ELSIF 以前のboolean_expressionにTRUEの値がなかった場合に評価される、boolean_expressionの開始を知...
statement テストの結果に応じて実行される操作。 例 例1 IF( @ISMBR(@DESCENDANTS(Europe)) OR @ISMBR(@DESCENDANTS(Asia)) ) Taxes = "Gross Margin" * "Foreign Tax Rate"; ELSE Taxes = "Gross Margin" * "Domestic Tax Rate"; ENDIF; ...
在ORACLE中使用if语句在FROM语句中选择表Oracle不允许有条件地包含表。一个选项可能是始终连接TABLE_B并...