The CASE statement can be used in the following versions of Oracle/PLSQL: Oracle 12c, Oracle 11g, Oracle 10g, Oracle 9i Example The CASE statement can be used in Oracle/PLSQL. You could use the CASE statement in a SQL statement as follows: (includes theexpressionclause) SELECT table_name...
Performance – the database stops processingcasewhen it finds the firsttruecondition. Ordering the clauses so the most likely are at the top can make the expression faster. In most cases, this benefit is tiny so only worth considering when speed is critical. With yourcaseexpression in hand, ...
In this example, if the deptno column has a 10 in it, the SQL query will return the value accounting rather than the number 10. If the deptno is not 10, 20, 30, or 40, then the CASE statement will fall through to the ELSE clause, which will return unassigned. Note that with a s...
where af.appid=aid and af.foundationid=fid;-- 没有into,编译报错,提示:Compilation Error: PLS-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。 可以在该语法之前,先利用select count(*) from...
B) Using CASE expression in a HAVING clause Consider the followingorder_itemsandproductstables: In the following query, we use theCASEexpression in aHAVINGclause to restrict rows returned by theSELECTstatement. SELECTproduct_name, category_id,COUNT(product_id)FROMorder_itemsINNERJOINproductsUSING(prod...
SELECT supplier_id FROM suppliers WHERE supplier_name = 'Apple' OR supplier_name = 'Microsoft'; This Oracle WHERE clause example uses the WHERE clause to define multiple conditions, but instead of using theAND condition, it uses theOR condition. In this case, this SELECT statement would return...
Without an ORDER BY clause, the order in which rows are returned between one SELECT statement and another is not guaranteed. When ORDS paginates SQL-based responses, a separate and unique query is used for each page request (i.e. offsets and the included "next" URL). Read more about pa...
Once a SET TRANSACTION READ ONLY statement successfully executes, only SELECT (without a FOR UPDATE clause), COMMIT, ROLLBACK, or non-DML statements (such as SET ROLE, ALTER SYSTEM, LOCK TABLE) are allowed in the transaction. Otherwise, an error is returned. A COMMIT, ROLLBACK, or DDL ...
1-4 1.3.1.1 Ensuring That Auditing Is Enabled in the Source Database... 1-4 1.3.1.2 Using Recommended Audit Settings in the Source Database ... 1-5 1.3.2 Requirements for SQL Server, Sybase ASE, and IBM DB2 Databases... 1-6 1.4 Starting the Oracle Audit Vault Console......
Why can't I create a PreparedStatement that doesselect * from tab where id in (?, ?, ?, ...)? The problem is that the RDBMS does not support bind parameters for the elements in the IN clause. This is a limitation of the database, not the driver. ...