SQL Syntax The SQL query strings for Windows Installer are restricted to the following formats. SQL Grammar The optional parameters are shown enclosed in brackets [ ]. When several choices are listed, the optional parameters are separated by a vertical bar. A {constant} is either a string or an integer. A string must be enclosed in single quote marks 'example'. The LOCALIZABLE option sets a column attribute that indicates the column needs to be localized. A {column} is a columnar reference to a value in a field of a table. A WHERE {operation-list} clause is optional and is a grouping of operations to be used to filter the selection. {column} = {column}{column} = | <> | > | < | >= | <= {constant}{column} = | <> | > | < | >= | <= {marker}{column} is null{column} is not null For string values, only the = or <> operations are possible. Individual operations can be grouped by AND or OR operators. The ORDER BY clause is optional and causes an initial delay during sorting.
SQL Tutorial - Queries SQL coins the term query as the name for its commands. Basically, all SQL code is written in the form of a query statement and then executed against a database. All SQL queries perform some type of data operation such as selecting data, inserting/updating data, or creating data objects such as SQL databases and SQL tables. Each query statement begins with a clause such as SELECT,UPDATE, CREATE or DELETE. SELECT queries are the most commonly used SQL commands, so let's take a look at a SELECT query that will return records from the orders table that we created previously in the SQL Tables lesson. SQL Query Code: USE mydatabase; SELECT * FROM orders; SQL Query Results: We'll explain the mechanics of this code in the next lesson. Here's a look at a few different query types including a INSERT and SELECT query we will be covering in the next lesson, SQL Select. SQL Query Examples: More information about these queries can be found at the following links: SQL Insert, SQL Update, SQL Delete
The 10-Minute LDAP Tutorial - Automating System Administration with Perl - O'Reilly Media The action in LDAP takes place around a data structure known as an entry. Figure C.1, “The LDAP entry data structure” is a picture to keep in mind as we look at an entry’s component parts. An entry has a set of named component parts called attributes that hold the data for that entry. To use database terms, they are like the fields in a database record. Besides its name, an attribute consists of a type and the value for the attribute. An entry’s contents and structure are defined by its object class. Let’s look a little closer at the objectClass attribute, because it illustrates some of the important qualities of LDAP and allows us to pick off the rest of the jargon we haven’t encountered yet. So far we’ve been focused on a single entry, but there’s very little call for a directory that contains only one entry. The stuff we’ve discussed so far all falls under what the LDAP specification calls its “information model.” An RDN is composed of one or several attribute name/value pairs.
SQL for Beginners - SQL Tutorial for Beginners with Examples | Udemy "Learn SQL in 6 days" Video Course provides a basic understanding of databases, tables, as well as how to manipulate data with functions like add, edit or delete data from tables and databases. Data retrieval concepts, which includes sorting, filtering, multi-table join, sub-queries and using functions in retrieval statements are discussed in detail. This course covers the following topics: Database Basics Schema Managing Database and Tables Populating Data Retrieving Data Functions Creating Sub-totals Sub-queries This course requires approximately 3.5 hours to complete. But we would recommend you to split it into 6 days to have a complete understanding of the concepts. This course is structured in such a way that one can start writing SQL in hours with confidence.