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DEPOT
NexusDB is a royalty-free, SQL:2003 core compliant, Client/Server and Embedded database system, with features that rival other heavily licensed products. NexusDB introduces unique new features for Delphi developers while further improving on its core strengths stability, performance and flexibility. New!INSERT STATEMENT
There are two main variations of the INSERT statement, the first is using a query expression to add rows based on data from existing tables in the database, and the second is using a table value constructor to specify a single row or a comma-separated list of row values. ♦. The DEFAULT VALUES clause is a third option that can beused to
CREATE TABLE STATEMENT The CREATE TABLE statement creates a new table in the database with metadata according to the table definition. ♦. The schema and table names shall conform to the format rules for identifiers and schema-qualified names in NexusDB SQL. The table is created in the database specified by schema-name.AGGREGATE FUNCTIONS
The SUM function calculates the sum of non-null values in the set. ♦. The argument shall be a numeric type. ♦. If the argument is an integer type, then the data type of the result is BIGINT. ♦. If the argument is a BCD type, then the data type of the result is DECIMAL with maximum possible precision and the same scale as the argument.♦.
UPDATE STATEMENT
♦: The SET clause is a comma-separated list of column assignments. The assigned value can be any valid value expression, including value functions, user-defined functions, scalar subqueries, case expressions, DEFAULT and NULL. CODE EXAMPLES & FRAGMENTS Code Examples & Fragments. Wed, 03/04/2009 - 20:02 | hdanzl. In this section we present some example projects, in Delphi, which illustrate some of the more commonly used features of a DBMS. Each of these projects is intended to illustrate a straightforward way of implementing a common task. There are many ways to do each of these(for instance
STORED PROCEDURES AND FUNCTIONS The support for user-defined procedures and functions, commonly known as stored procedures, makes NexusDB SQL a programmable database language, allowing users to automate tasks and extend the built-in functionality with custom routines. NexusDB SQL supports user-defined procedures and functions written in SQL, called SQL routines, orhosted in
IF STATEMENT
The optional ELSEIF clause is used to specify additional conditions with separate statement blocks, and is a convenient shorthand for nesting multiple IF..THEN statements. Only the statements contained in the first IF or ELSEIF clause with a condition that evaluates to true are executed. An optional ELSE clause can be specified to execute one ALTER TABLE STATEMENT ALTER COLUMN lastName. ADD CONSTRAINT NOT NULL. 3) The following example removes the picture column from the students table: ALTER TABLE students. DROP COLUMN picture. 4) The following example adds a FOREIGN KEY constraint to the enrolls table: ALTER TABLE enrolls.TNXWINSOCKTRANSPORT
TnxWinsockTransport. NexusDB TCP/IP transport component. Default values are shown in the object inspector snapshot. The most commonly used transport, TnxWinsockTransport represents a TCP/IP v4 connection over a network. The servername property is the DNS or alternatively takes the form servername@ip_address where servername@ is optional. | NEXUSDBSHOPNEXUS REMOTINGSEARCHDOWNLOADSWHAT IS NEXUSDBNEXUSDB CODEDEPOT
NexusDB is a royalty-free, SQL:2003 core compliant, Client/Server and Embedded database system, with features that rival other heavily licensed products. NexusDB introduces unique new features for Delphi developers while further improving on its core strengths stability, performance and flexibility. New!INSERT STATEMENT
There are two main variations of the INSERT statement, the first is using a query expression to add rows based on data from existing tables in the database, and the second is using a table value constructor to specify a single row or a comma-separated list of row values. ♦. The DEFAULT VALUES clause is a third option that can beused to
CREATE TABLE STATEMENT The CREATE TABLE statement creates a new table in the database with metadata according to the table definition. ♦. The schema and table names shall conform to the format rules for identifiers and schema-qualified names in NexusDB SQL. The table is created in the database specified by schema-name.AGGREGATE FUNCTIONS
The SUM function calculates the sum of non-null values in the set. ♦. The argument shall be a numeric type. ♦. If the argument is an integer type, then the data type of the result is BIGINT. ♦. If the argument is a BCD type, then the data type of the result is DECIMAL with maximum possible precision and the same scale as the argument.♦.
UPDATE STATEMENT
♦: The SET clause is a comma-separated list of column assignments. The assigned value can be any valid value expression, including value functions, user-defined functions, scalar subqueries, case expressions, DEFAULT and NULL. CODE EXAMPLES & FRAGMENTS Code Examples & Fragments. Wed, 03/04/2009 - 20:02 | hdanzl. In this section we present some example projects, in Delphi, which illustrate some of the more commonly used features of a DBMS. Each of these projects is intended to illustrate a straightforward way of implementing a common task. There are many ways to do each of these(for instance
STORED PROCEDURES AND FUNCTIONS The support for user-defined procedures and functions, commonly known as stored procedures, makes NexusDB SQL a programmable database language, allowing users to automate tasks and extend the built-in functionality with custom routines. NexusDB SQL supports user-defined procedures and functions written in SQL, called SQL routines, orhosted in
IF STATEMENT
The optional ELSEIF clause is used to specify additional conditions with separate statement blocks, and is a convenient shorthand for nesting multiple IF..THEN statements. Only the statements contained in the first IF or ELSEIF clause with a condition that evaluates to true are executed. An optional ELSE clause can be specified to execute one ALTER TABLE STATEMENT ALTER COLUMN lastName. ADD CONSTRAINT NOT NULL. 3) The following example removes the picture column from the students table: ALTER TABLE students. DROP COLUMN picture. 4) The following example adds a FOREIGN KEY constraint to the enrolls table: ALTER TABLE enrolls.TNXWINSOCKTRANSPORT
TnxWinsockTransport. NexusDB TCP/IP transport component. Default values are shown in the object inspector snapshot. The most commonly used transport, TnxWinsockTransport represents a TCP/IP v4 connection over a network. The servername property is the DNS or alternatively takes the form servername@ip_address where servername@ is optional.| NEXUSDB
NexusDB is a royalty-free, SQL:2003 core compliant, Client/Server and Embedded database system, with features that rival other heavily licensed products. NexusDB introduces unique new features for Delphi developers while further improving on its core strengths stability, performance and flexibility. New!TOOLS | NEXUSDB
The main developer tool for creating and maintaining your NexusDB databases. The main window of of the EM work area is the Server window (all popup menus shown for completeness). From this centralized window you can browse all your servers, databases and tables with ease, addSTRING TYPES
CHAR VARYING and VARCHAR are equivalent to CHARACTER VARYING. ♦. NULLSTRING is a NexusDB synonym for CHARACTER VARYING. ♦. SHORTSTRING is a NexusDB-specific variable-length character string type with a maximum length of 255 characters. ♦. SINGLECHAR is a NexusDB-specific type that defines a single 8-bit character. ♦. STARTING AND SETTING UP THE SERVER Here's a quick step by step guide to get it setup and running for the examples. Step 1: Start the server. This is very simple. Just double click the nxServer.exe and you're done. Step 2: Setting up the server and activating it. •. Select the Server Engine item from the THE ENTERPRISE MANAGER The Enterprise Manager. Wed, 03/04/2009 - 20:02 | hdanzl. Introduction. Global Options. Using the Servers Window. Creating and Restructuring Tables. Browsing Tables and Queries. Importing CSV Files. Printing Reports. HOW TO COPY TABLES BETWEEN TWO DATABASES Save the local data, copy it and then merge it together. The TnxBackupController is really straightforward. fill in the original database with the remotedatabase. clone database becomes your localdatabase. then use nxBackupcontroller1.backup. use the oninclude table to test if you want to include the remote-table. DROP TABLE STATEMENT Dropping a table automatically deletes all indexes and triggers owned by the table. ♦. RESTRICT, which is implicit and the only supported drop behavior, prevents the table from being deleted if the table is referenced by other tables, views, triggers, procedures or functions. ♦. The DROP TABLE statement requires exclusive access to the HOW TO RESTRUCTURE TABLES? "We particularly appreciate the constant, expert product support delivered by the NexusDB Team." Mark Tinney "We are very excited about what NexusDB does to improve our product." HOW TO USE MEMORY TABLES? Connect up the following code to the appropriate button click events: Top button – converts a normal table into a memory table: if nxTable1.TableName ='Details
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