SuSuppose your SQL database has a table with a column called FullName that contains the full name of each employee (first, middle, and last names separated by spaces). To extract the middle name for each employe
hr_analz.sql hr_code.sql hr_comnt.sql hr_cre.sql hr_dn_c.sql hr_dn_d.sql hr_drop.sql hr_idx.sql hr_main.sql hr_popul.sql 其实这些脚本,写的非常标准,除了创建测试schema,我们也可以从中学习他的代码逻辑、注释风格、调用方式,是很好的借鉴。
The complete versions of all of the examples in this section are in thedemo/complex-typesdirectory where you installed the driver. For more information, seeSample code files. The following example includes a Java™ class that implements thejava.sql.SQLDatainterface. Here is a sample database ...
Simple UNICODE Example The following example will show the UNICODE of the character “υ”. SELECT UNICODE(N'υ') as code Note that if several characters are used as input, the UNICODE function will only return the code of the first letter which is “a”. SELECT UNICODE(N'aei') as code...
The code in this example uses an EntityCommand to execute an Entity SQL query. This query returns a list of records that represent instances of the Categories entity type. An EntityDataReader is used to access data records in the result set. For more information, see EntityClient Provider ...
Create a SQL user role (group of users). CREATE ROLE basic_user; DROP ROLE Remove a SQL user role. DROP ROLE basic_user; CREATE USER Create a new user. CREATE USER alex; DROP USER Remove a user. DROP USER alex; GRANT Grant privileges to a user or a role. GRANT DELETE ON TABLE ...
is a long way from one that’d be suitable for a large tertiary institution, but it does illustrate relationships that are interesting to query, and it’s easy to relate to when you’re learning SQL. We explain the requirements next and discuss their shortcomings at the end of this ...
/** -- cdemo81.c --* An example program which adds new employee* records to the personnel data base. Checking* is done to insure the integrity of the data base.* The employee numbers are automatically selected using* the current maximum employee number as the start.** The program querie...
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INSERT Examples (Transact-SQL) This topic provides examples of using the Transact-SQLINSERTstatement in SQL Server 2008 R2. The INSERT examples are grouped by the following categories. Category Featured syntax elements Basic syntax INSERT • table value constructor ...