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' || ...
Type '\c' to clear the current input statement. obclient(ALVIN@oboraclegbk)[ALVIN]> CREATE OR REPLACE TYPE typ_varchar_array IS TABLE OF VARCHAR2(4000); Query OK, 0 rows affected (0.094 sec) obclient(ALVIN@oboraclegbk)[ALVIN]> CREATE OR REPLACE FUNCTION fn_split ( pv_str IN VARCHAR...
InboundOperationType指定是要执行轮询还是通知入站操作。 默认值为轮询。 PolledDataAvailableStatement指定适配器执行的 SQL 语句,以确定是否有任何数据可用于轮询。 仅当记录可用时,才会执行为PollingStatement绑定属性指定的 SELECT 语句。 默认值为SELECT 1 FROM DUAL,这意味着无论要轮询的表是...
Array B=(select id from B); for(int i=0;i<A.length;i++) { for(int j=0;j<B.length;j++) { if(A[i].id==B[j].id) { resultSet.add(A[i]); break; } } } return resultSet; 可以看出,当B表数据较大时不适合使用in(),因为它会B表数据全部遍历一次. ...
IF语句主要有以下三种基本形式: 一、 IF-THEN语句 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; ...
The syntax for the SELECT statement in Oracle/PLSQL is: SELECT expressions FROM tables [WHERE conditions]; Parameters or Arguments expressions The columns or calculations that you wish to retrieve. Use * if you wish to select all columns. ...
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...
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...
- 00428 : an INTO clause is expected in this SELECT statement 3.在利用select...into...语法时,必须先确保数据库中有该条记录,否则会报出"no data found"异常。 select count(*) from 查看数据库中是否存在该记录,如果存在,再利用select...into... ...