SqlAnyWhere相关示例SQL语句

1.创建表

2.创建视图

3.创建函数

4.创建存储过程

5.创建触发器

6.IF...ELSE

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--1.创建表

CREATE TABLE Orders (

order_num INTEGER NOT NULL PRIMARY KEY,

date_ordered DATE,

name CHAR(80)

);

CREATE TABLE Order_item (

order_num INTEGER NOT NULL,

item_num SMALLINT NOT NULL,

PRIMARY KEY (order_num, item_num),

-- When an order is deleted, delete all of its

-- items.

FOREIGN KEY (order_num)

REFERENCES Orders (order_num)

ON DELETE CASCADE

)

--2.创建视图

CREATE VIEW emp_dept

AS SELECT emp_lname, emp_fname, dept_name

FROM Employee JOIN Department

ON Employee.dept_id = Department.dept_id

--3.创建函数

CREATE FUNCTION fullname (

firstname CHAR(30),

lastname CHAR(30) )

RETURNS CHAR(61)

BEGIN

DECLARE name CHAR(61);

SET name = firstname || ' ' || lastname;

RETURN (name);

END

--4.创建存储过程

CREATE PROCEDURE

CustomerProducts( IN customer_id

INTEGER DEFAULT NULL )

RESULT ( product_id INTEGER,

quantity_ordered INTEGER )

BEGIN

IF customer_id IS NULL THEN

RETURN;

ELSE

SELECT product.id,

sum( sales_order_items.quantity )

FROM product,

sales_order_items,

sales_order

WHERE sales_order.cust_id = customer_id

AND sales_order.id = sales_order_items.id

AND sales_order_items.prod_id = product.id

GROUP BY product.id;

END IF;

END

-----------

CREATE PROCEDURE TopCustomer (OUT TopCompany CHAR(35), OUT TopValue INT)

BEGIN

DECLARE err_notfound EXCEPTION FOR

SQLSTATE '02000';

DECLARE curThisCust CURSOR FOR

SELECT company_name, CAST(

sum(sales_order_items.quantity *

product.unit_price) AS INTEGER) VALUE

FROM customer

LEFT OUTER JOIN sales_order

LEFT OUTER JOIN sales_order_items

LEFT OUTER JOIN product

GROUP BY company_name;

DECLARE ThisValue INT;

DECLARE ThisCompany CHAR(35);

SET TopValue = 0;

OPEN curThisCust;

CustomerLoop:

LOOP

FETCH NEXT curThisCust

INTO ThisCompany, ThisValue;

IF SQLSTATE = err_notfound THEN

LEAVE CustomerLoop;

END IF;

IF ThisValue > TopValue THEN

SET TopValue = ThisValue;

SET TopCompany = ThisCompany;

END IF;

END LOOP CustomerLoop;

CLOSE curThisCust;

END

----------

CREATE PROCEDURE OrderCount (IN customer_ID INT,

OUT Orders INT)

BEGIN

SELECT COUNT(DBA.sales_order.id)

INTO Orders

FROM DBA.customer

KEY LEFT OUTER JOIN "DBA".sales_order

WHERE DBA.customer.id = customer_ID;

END

--5.创建触发器

CREATE TRIGGER tr_manager

BEFORE UPDATE OF dept_head_id

ON department

REFERENCING OLD AS old_dept NEW AS new_dept

FOR EACH ROW

BEGIN

UPDATE employee

SET employee.manager_id=new_dept.dept_head_id

WHERE employee.dept_id=old_dept.dept_id

END

The next example, which is more complex,

deals with a statement-level trigger.

First, create a table as follows:

CREATE TABLE "DBA"."t0"

(

"id" integer NOT NULL,

"times" timestamp NULL DEFAULT current timestamp,

"remarks" text NULL,

PRIMARY KEY ("id")

)

Next, create a statement-level trigger for this table:

create trigger DBA."insert-st" after insert order 4 on

DBA.t0

referencing new as new_name

for each statement

begin

declare @id1 integer;

declare @times1 timestamp;

declare @remarks1 long varchar;

declare @err_notfound exception for sqlstate value '02000';

//declare a cursor for table new_name

declare new1 cursor for

select id,times,remarks from

new_name;

open new1;

//Open the cursor, and get the value

LoopGetRow:

loop

fetch next new1

into @id1, @times1,@remarks1;

if sqlstate = @err_notfound then

leave LoopGetRow

end if;

//print the value or for other use

Print (@remarks1);

end loop LoopGetRow;

close new1

end

--6.IF...ELSE

/* Transact-SQL IF statement */

IF @v1 = 0

PRINT '0'

ELSE IF @v1 = 1

PRINT '1'

ELSE

PRINT 'other'

/* Watcom-SQL IF statement */

IF v1 = 0 THEN

PRINT '0'

ELSEIF v1 = 1 THEN

PRINT '1'

ELSE

PRINT 'other'

END IF