rapid sql tutorial

next step:17. Click Add Current User.18. Select Install native mode default configuration.19, do not choose these two, direct next ...20. Direct Next Step ...21, installation information, into the installation .....22, the front configured n long, now formally into the installation ...Finally, when the installation is complete, the SQL Server 2008 executable appears in the Start menu.Specific view: Previous posthttp://blog.csdn.net/bugdemo/article/de

PRIMARY KEY,Order_date datetime,Customer_sid integer REFERENCES CUSTOMER (SID),Amount double);The following example specifies a foreign key by changing the table schema. This assumes that the ORDERS table has been built and the foreign key has not been specified:MySQL:ALTER TABLE ORDERSADD FOREIGN KEY (customer_sid) REFERENCES Customer (SID);Oracle:ALTER TABLE ORDERSADD (CONSTRAINT fk_orders1) FOREIGN KEY (customer_sid) REFERENCES Customer (SID);SQL

have turnover (sales). To achieve this, we use the following SQL statement:SELECT txn_date from Store_informationUNIONSELECT txn_date from Internet_sales;Results: Txn_date jan-05-1999 jan-07-1999 jan-08-1999 jan-10-1999 jan-11-1999 jan-12-1999 One thing to note is that if we use SELECT DISTINCT txn_date in any

),Amount double); SQL Server: CREATE TABLE ORDERS(order_id integer PRIMARY KEY,Order_date datetime,Customer_sid integer REFERENCES CUSTOMER (SID),Amount double); The following example specifies a foreign key by changing the table schema. Here if the ORDERS table is already built. And the foreign key has not been specified: MySQL: ALTER TABLE ORDERSADD FOREIGN KEY (customer_sid) REFERENCES Customer (SID); Oracle: ALTER TABLE ORDERSADD (CONSTRAINT fk_or

Account Name drop-down menu, select NT Authority\System, the password is empty, click OK, go to the next step. 16. Select the blending mode, set the administrator password, and specify the administrator entry point to add the current user. Then the next step: 17. Click Add Current User. 18. Select Install native mode default configuration. 19, do not choose these two, direct next ... 20. Direct Next Step ... 21, installation information, into the installation ..... 22,

click Next . Click next ; Click next ; Click next ; SQL Server Agent account name selection: NT aouthority/system SQL Server Database engine account name selection: NT NETWORK SERVICE SQL serveranalysis Services account name selection: NT NETWORK SERVICE SQL serverreporting Services account name selection: NT NE

behind the objects they are replacing, and they are separated by a blank space. We continue to use the store_information form to do an example:store_information Form Store_name Sales Txn_date Los Angeles 1500 05-jan-1999 San Diego 250 07-jan-1999 Los Angeles 300 08-jan-1999 Boston 700 08-jan-1999 We use the same example as the

is alsoDate。 This may be convenient or confusing-you choose to do so.PostgreSQL supports the standard SQL type int,smallint,real,double precision,char (N ),varchar (N),date,time,timestamp , and Intervalalso supports other types of common functionality and rich geometry types. any number of user-defined data types can be customized in PostgreSQL. Thus the type name is not a syntax keyword, except for the special exceptions that

The purpose of the UNION all directive is to merge the results of the two SQL statements together. the union All and union differ in that union all lists each qualifying material, regardless of whether the data value is repeated or not.The syntax for UNION All is as follows:[SQL Statement 1]UNION All[SQL statement 2];We use the same example as the previous page

the object they are replacing. And the middle of them is separated by a blank.We continue to use the store_information form to do a sample:store_information Form Store_name Sales Txn_date Los Angeles 1500 05-jan-1999 San Diego 250 07-jan-1999 Los Angeles 300 08-jan-1999 Boston 700 08-jan-1999 We use the same example as the

= "+pword+" "//yourpwd replace the sa account password set for you */string strconn =" Data Source=hyper-v-win2003\\sqlsrv2005;initia LCatalog=mytest; User Id=sa; Password=sa "; SqlConnection conn = null; SqlCommand SQLCMD = null; try {//Create connection Object conn = new SqlConnection (strconn); Open the database connection conn. Open (); Create TRANSAC SQL Command object SQLCMD = conn. CreateCommand (); Cre

What is the most tragic thing about the world for programmers? -The hand is cheap, the data of the database to delete, more sad is the wood has any database backupThis happened today, a colleague delete data table data is not written conditions, the result oo, the table data is all gone. after a morning struggle finally to restore the data, thanks to the almighty degree Niang, thanks to the selfless dedication of netizens, most grateful for the powerful Logexplorer tools. Fortunately, it is not

Los Angeles 500 08-jan-1999 Boston 700 08-jan-1999 In this example, only one of the data conforms to the conditions in the WHERE clause. If more than one information is eligible, each qualifying document will be modified.We can also modify several fields at the same time. This syntax is as follows:UPDATE "Table"SET "Field 1" = [value 1], "field 2" = [value 2]WHERE "condition";In some cases, we will need to remove some data directly fr

First_Name CHAR (50) Last_Name CHAR (50) Country CHAR (25) We can also connect two tables using a view table. In this case, the user can find the information she wants directly from a view table, without having to make a connection action from two different tables. Suppose you have the following two tables:store_information Form Store_name Sales Txn_date Los Angeles 1500 05-

Label: There is data need to use SQL Server R2, directly to start the installation, because it is under the non-administrator account, directly caused the installation failure. The fix also ended in failure. After go to administrator account under the perfect uninstall, you can reinstall.Method/Step After the installation fails, use the SQL Server R2 Repair and Uninstall tool All failed Sea

What does SQL do for you? One of the most frequently used methods is to select data from tables in the database.From this answer, we can immediately see two keyword: Select from a table in the (from) database. (a table is a structure within a database that is designed to store data.)In this section of table handling , we'll mention how to use SQL to set tables. We can see the most important

SQL having usages and instances tutorial The HAVING clause is optional, combined with the GROUP BY clause. It is similar to a WHERE clause, but the restrictions specified by the clause determine which records will be displayed after they have been grouped. It is usually at the end of the SQL statement, and a SQL state

Tags: SQL distinct The SELECT command allows us to read all the data from one or more fields in a table. This will take all the data out, regardless of whether the data values are duplicated or not. In data processing, we often encounter situations where we need to find out the different data values in the table. In other words, we need to know what the different values are in this table/field, and the number of times each value appears i

choose between these two fields from small to large, then this clause will cause the result is based on "column one" from small to large rows. If there are several pieces of information "field one" value is equal, then these data will be based on "column two" from the small to large row.For example, if we want to list the information in the store_information form in the Sales column from the big to the small,store_information Form Store_name Sales Txn_date

SQL LEN () function Instance Tutorial In Len () functionThe Len () function returns the value of the length in the text field.Database Len () syntax SELECT LEN (column_name) from table_name Let's take a look at an example. Id LastName FirstName Address City 1 Hansen Ola TIMOTEIVN 10 Sandnes