free barcode generator source code in vb.net PROGRAMMING WITH SQL in Software

Drawer ANSI/AIM Code 128 in Software PROGRAMMING WITH SQL

PROGRAMMING WITH SQL
Scan Code 128A In None
Using Barcode Control SDK for Software Control to generate, create, read, scan barcode image in Software applications.
Code 128B Generator In None
Using Barcode generation for Software Control to generate, create Code 128 Code Set A image in Software applications.
SQL: The Complete Reference
Scan Code-128 In None
Using Barcode decoder for Software Control to read, scan read, scan image in Software applications.
Code 128B Printer In C#.NET
Using Barcode generation for .NET framework Control to generate, create Code 128 Code Set A image in .NET framework applications.
Scrolling Cursors
Print Code 128B In .NET Framework
Using Barcode encoder for ASP.NET Control to generate, create ANSI/AIM Code 128 image in ASP.NET applications.
Code 128C Creator In VS .NET
Using Barcode creation for Visual Studio .NET Control to generate, create Code 128 Code Set A image in VS .NET applications.
The SQL/CLI standard specifies CLI support for scrolling cursors that parallels the scrolling-cursor support originally included in the SQL2 standard for embedded SQL. The SQLFetchScroll() call, shown in Figure 19-17, provides the extended FETCH functions needed for forward/backward and random retrieval of query results. One of its parameters specifies the statement handle for the query, just as for the simple SQLFetch() call. The other two parameters specify the direction of FETCH motion (PREVIOUS, NEXT, and so on) and the offset for FETCH motions that require it (absolute and relative random row retrieval). The operation of SQLBindCol() and SQLGetData() for processing returned values is identical to that described for the SQLFetch() call.
Paint Code 128 Code Set B In VB.NET
Using Barcode generation for Visual Studio .NET Control to generate, create Code 128 Code Set B image in .NET applications.
Bar Code Maker In None
Using Barcode generator for Software Control to generate, create bar code image in Software applications.
Named Cursors
Draw UPCA In None
Using Barcode encoder for Software Control to generate, create GTIN - 12 image in Software applications.
Make Code 128 In None
Using Barcode drawer for Software Control to generate, create Code 128C image in Software applications.
Note that the CLI doesn t include an explicit cursor declaration call to parallel the embedded SQL DECLARE CURSOR statement. Instead, SQL query text (that is, a SELECT statement) is passed to the CLI for execution in the same manner as any other SQL statement, using either a SQLExecDirect() call or SQLPrepare() / SQLExecute() call sequence. The results of the query are identified by the statement handle in subsequent SQLFetch(), SQLBindCol(), and similar calls. For these purposes, the statement handle takes the place of the cursor name used in embedded SQL. A problem with this scheme arises in the case of positioned (cursor-based) updates and positioned deletes. As described in 17, a positioned database UPDATE or DELETE statement (UPDATE WHERE CURRENT OF or DELETE WHERE CURRENT OF) can be used to modify or delete the current (that is, just fetched) row of query results. These embedded SQL statements use the cursor name to identify the particular row to be processed, since an application program may have more than one cursor open at a time to process more than one set of query results. To support positioned updates, the CLI provides the SQLSetCursorName() call shown in Figure 19-17. The call is used to assign a cursor name, specified as one of its parameters, to a set of query results, identified by the statement handle that produced them. Once the call has been made, the cursor name can be used in subsequent positioned UPDATE or DELETE statements, which can be passed to the CLI for execution. A companion call, SQLGetCursorName(), can be used to obtain a previously assigned cursor name, given its statement handle.
DataMatrix Printer In None
Using Barcode maker for Software Control to generate, create ECC200 image in Software applications.
Make Code 39 In None
Using Barcode encoder for Software Control to generate, create Code 3/9 image in Software applications.
Dynamic Query Processing with CLI
ABC Codabar Generator In None
Using Barcode printer for Software Control to generate, create USS Codabar image in Software applications.
USS-128 Printer In .NET Framework
Using Barcode creator for VS .NET Control to generate, create EAN 128 image in .NET framework applications.
If the columns to be retrieved by a SQL query are not known in advance when a program is developed, the program can use the query-processing calls in Figure 19-19 to determine the characteristics of the query results at runtime. These calls implement the same type of dynamic SQL query-processing capability that was described for
ECC200 Scanner In .NET
Using Barcode decoder for .NET Control to read, scan read, scan image in .NET applications.
USS Code 39 Generation In .NET
Using Barcode creator for Reporting Service Control to generate, create USS Code 39 image in Reporting Service applications.
19:
Barcode Generation In Java
Using Barcode generator for Eclipse BIRT Control to generate, create barcode image in BIRT reports applications.
Bar Code Maker In Visual C#
Using Barcode printer for .NET Control to generate, create barcode image in .NET framework applications.
SQL APIs
GTIN - 12 Generation In Objective-C
Using Barcode creator for iPad Control to generate, create UPC Code image in iPad applications.
Code 128 Creation In Java
Using Barcode printer for BIRT reports Control to generate, create Code128 image in Eclipse BIRT applications.
/* Determine the number of result columns in a query */ short SQLNumResultCols ( long stmtHdl, /* IN: statement handle */ short *colcount) /* OUT: returned number of columns */ /* Determine the characteristics of a column of query results */ short SQLDescribeCol ( long stmtHdl, /* IN: statement handle */ short colnr, /* IN: number of column to describe */ char *colname, /* OUT: name of query results column */ short buflen, /* IN: length of column name buffer */ short *namlen, /* OUT: actual column name length */ short *coltype, /* OUT: returned column data type code */ short *colsize, /* OUT: returned column data length */ short *decdigits, /* OUT: returned # of digits in column */ short *nullable) /* OUT: can column have NULL values */ /* Obtain detailed info about a column short SQLColAttribute ( long stmtHdl, /* IN: short colnr, /* IN: short attrcode, /* IN: char *attrinfo, /* OUT: short buflen, /* IN: short *actlen, /* OUT: int *numattr) /* OUT: of query results */ statement handle */ number of column to describe */ code of attribute to retrieve */ buffer for string attr. info */ length of col attribute buffer */ actual attribute info length */ returned integer attr. info */
/* Retrieve frequently used info from a CLI descriptor */ short SQLGetDescRec ( long descHdl, /* IN: descriptor handle */ short recnr, /* IN: descriptor record number */ char *name, /* OUT: name of item being described */ short buflen, /* IN: length of name buffer */ short *namlen, /* OUT: actual length of returned name */ short *datatype, /* OUT: data type code for item */ short *subtype, /* OUT: data type subcode for item */ short *length, /* OUT: length of item */ short *precis, /* OUT: precision of item, if numeric */ short *scale, /* OUT: scale of item, if numeric */ short *nullable) /* OUT: can item have NULL values */
Copyright © OnBarcode.com . All rights reserved.