sql programming books

column in a row of data to the specified variable in turn.It is important to note that the type and number of variables corresponds to the columns of the cursor has an row.When you use the FETCH command to remove data from a cursor, you can envision a pointer to a row of data in the cursor.When the cursor is just opened, the pointer points to the first row, and each time a row is fetched, the pointer automatically points to the next line until all data is removed.After the cursor is used, it sh

17.5 SQL Programming Instance After learning how to write SQL programs, we can start to create our own applications, by creating applications we will be more impressed with the power of Delphi, and will be more comprehensive knowledge of SQL programming, in this section we

If you've ever moved data into or out of SQL Server, you can now use Microsoft's DTS or Microsoft's Data Transfer Service tool. DTS is a tool for ETL (the abbreviation for extraction, transmission, and loading) that allows database administrators to create a series of steps to describe how data is transmitted. These "packages", like their names, can be run by a number of different programming languages or d

The case of PL/SQL programming specification As in SQL, Pl/sql is case-insensitive. Its general guidelines are as follows: Keywords (BEGIN, EXCEPTION, end, IF THEN else,loop, End LOOP), data type (VARCHAR2, number), internal functions (least, SUBSTR), and user-defined subroutines (procedures, functions,packages), usi

is set to the Demos,sql property value: Select Orders.custno,orders.orderno,orders.saledate from Orders WHERE Orders.custno =: Custno The Datasouce property of orders is set to Custsource A tdatasource part The name is Ordersource and its dataset attribute is set to orders. Two Tdbgrid parts They are connected to Custsource and Ordersource respectively. Parameters in the dynamic SQL statement in th

PL/SQL programming 1 Contents Chapter 1 Introduction to PL/SQL program design ................................ ........................................ ............ 4 § 1. 2 SQL and PL/SQL .................................. ........................................ ..........

PL/SQL programming method Daquan I. dynamic SQL splicing (using replace) www.2cto.com pay attention to using replace to achieve dynamic SQL splicing effect, v_psql can be used to pass variables [plain] 1 declare 2 a number: = 2; 3 v_ SQL varchar2 (4000): = 'select ename from

PL/SQL1. Procedures, functions, and triggers are written in PL/SQL2, procedures, functions, triggers are stored in the Oracle database3. PL/SQL is a very powerful process language4, procedures, functions, triggers can be called in a Java programPL/SQL Writing can save a little time is to improve the performance (volume), Java directly call the database storage process, the resolution time is saved, improve

and the necessary parameter information in the call, it can reduce the network traffic and the simple network burden to some extent. 1, the advantages of stored procedures A, stored procedure allows standard component-type programming After a stored procedure is created, it can be invoked more than once in a program, without having to rewrite the SQL statement for the stored procedure. and database profes

Label:"PL/SQL Programming Basics"Grammar:DeclareDeclaration parts, such as defining variables, constants, cursorsBeginprogram writing, SQL statementsexceptionHandling ExceptionsEnd/forward slash indicates fast execution of the programExample--Created on 2016/8/22 by VITASDeclare defining variablesV_num number;V_eno number;V_ename VARCHAR2 (10);Beginv_num:=234;v_e

Facilitates the operation of client/server environment applicationsFor a client/server environment, the real bottleneck is on the network. No matter how fast the network, as long as the client and the server to do a large amount of data exchange, the efficiency of the application run back to be affected. If you are programming with PL/SQL, placing such an application with a large amount of data processing i

the contained blocks. In addition, whether an abnormal modal is triggered in the declaration part or in the exception handling part, the abnormal modal is immediately transmitted to the inclusion block. When the preceding rules are referenced in the contained block, the processing of abnormal modal will not be executed even if the OTHERS processor is set in the current block. 4 easy to read ● End ID is used for subprograms, triggers, packages, and other program blocks with names. For example:

be converted to '2017 00:00:00. 000 '. Therefore, based on the preceding conditions, the final result will contain data of '2017 00:00:00. 000. To improve the content above, we can change the value of the upper boundary to '2017 23:59:59. 123 '. In this way, the data of '2017 00:00:00. 000' will not be contained. The following describes how to use better conditions: Where Dt> = '2014 00:00:00. 000' and Dt When using the preceding Dt> = '2014 00:00:00. 000' and Dt Dt> = '000000' and Dt The ab

=2' Else 'num is not equal to 1, nor is it equal to 2' End asCol Seems to be used only in SELECT statements? I tried to get Case...when...then...end out of SELECT, but it didn't work ... Looping statementsWhile loop Let's go straight to a simple example: Declare @num int Set @num=3 while(@num>0)--parentheses don't seem to be necessary either. begin Print @num Set @num=@num-1 End Go Implementing loops using Goto statements Goto statement is actually used

--Embedded SQL programming --SQL2005 Administrator Daquan -An application that embeds an SQL statement is called a host program, and the language in which the program is written is called the host language. Host language can be C, C + +, Java, and so on. Embedded SQL statements are syntactically similar to interacti

The SQL Server Integrated Services (SSIS) used in Microsoft's SQL Server 2005 to replace data transfer services (DTS) contains a number of tools for importing data and translating it into meaningful information, not just passive imports. But one thing to keep in mind is that this new SSIS tool doesn't always cover everything you need to do. As a result, Microsoft offers two basic ways to extend the capabil

Visual Studio. net Chinese Version beta 2 has been released for some time. Compared with the early version of Beta 1, the new version has undergone great changes in various aspects, including SQL Server programming, in Chinese beta 2, database access is generally switched to ole db. As database programming is the core of enterprise-level application development,

Oracle Database Programming: dynamic SQL: it is a string at compile time, and it is only found to be an SQL statement at run time. When SQL statements cannot be used directly, dynamic SQL is used. dynamic SQL is divided into early

way to display results, choose to display the results in text format While statementIncrease the sales price of all sales profit under 10% to 10 yuan, if there are still goods sales profit below 10%, in the increase of 10 yuan, until all commodity price profit is more than 10%, and finally show the increase in the largest number of goods added. PRINT ' starts updating the price of a low-sales product ' DECLARE @cs INT SET @cs =0 while ((SELECT COUNT (*) from the Product table WHERE sales price

);printf ("Please enter Latitude:");Gets (LA);Pre-executionSQLPrepare (hstmt,pre_sql,31);Binding parametersRetcode=sqlbindparameter (HSTMT,1,SQL_PARAM_INPUT,SQL_C_CHAR,SQL_CHAR,MAXNAME,0,AMP;CI,0,AMP;P1);Retcode=sqlbindparameter (HSTMT,2,SQL_PARAM_INPUT,SQL_C_CHAR,SQL_CHAR,MAXNAME,0,AMP;LO,0,AMP;P2);Retcode=sqlbindparameter (HSTMT,3,SQL_PARAM_INPUT,SQL_C_CHAR,SQL_CHAR,MAXNAME,0,AMP;LA,0,AMP;P3);Direct executionRetcode=sqlexecute (HSTMT);if (retcode!=sql_success retcode!=sql_success_with_info)pr