ID || ' '; END LOOP; --拼接主SQL TARGET_RESULTS := TARGET_RESULTS || 'FROM (SELECT a.PRO_NAME,a.CLASS_NAME,a.ID,a.MAIN_DATA_PRO_CODE,b.TIME '; TARGET_RESULTS := TARGET_RESULTS || 'FROM IEW_V_PRO_USER a LEFT JOIN (SELECT DISTINCT PROJECTID,TIME from V_IEW_ACC_DETAIL_...
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...
If you need to use this logic in many tables you could place it in a PL/SQL function. Then call this function in your SQL: 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-i...
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...
SQL 条件语句 (IF, CASE WHEN, IFNULL) 1、IF 1.1 表达式: IF( expr1 , expr2 , expr3 ) expr1条件,条件为true,则值是expr2 ,false,值就是expr3 示例; SELECT o.id,u.account,catagory
CASE SELECTOR WHEN EXPRESSION 1 THEN STATEMENT 1; WHEN EXPRESSION 2 THEN STATEMENT 2; ... WHEN EXPRESSION N THEN STATEMENT N; ELSE STATEMENT N+1; END CASE; 下面,试举一例:用于判断输入数值的奇偶性。 DECLAREv_numNUMBER:=&user_num;
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...
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数据库支持使用“IF - ELSE”进行简单的分支判断,语法结构和MSSQL Server的语法类似: IF { condition_1 } THEN { PL-SQL blocks A } ELSE { PL-SQL blocks B } END IF; 1. 2. 3. 4. 5. 条件语句放在 IF 和 THEN 之间,条件语句成立时执行语句块A,否则执行语句块B。在 IF ...
Look at the following SELECT statement: SELECTProductName, UnitPrice * (UnitsInStock + UnitsOnOrder) FROMProducts; In the example above, if any of the "UnitsOnOrder" values are NULL, the result will be NULL. Solutions MySQL The MySQLIFNULL()function lets you return an alternative value if...