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Phrase your CONTAINS clause like CONTAINS(pd[Description], 'stiff NEAR ride' ) and it will return all of the results you re looking for In order to use NEAR most effectively, it should be combined with the ranking features provided by CONTAINSTABLE and FREETEXTTABLE, discussed later in this chapter Behind the scenes, NEAR returns all results where both words are found It then assigns a rank to them, based on how far apart in the text the two words occur The closer together, the higher the rank; the more distant, the lower A rank of zero is given when the two words are more than 50 words apart Therefore, you ll need to combine NEAR with the ranking feature so that results can be sorted in a way most useful to your users You may also see times where a tilde (~) is substituted for the word near, as in CONTAINS(pd.

Mac OS X comes with various scripts that are installed in the /Library/Scripts/ folder and its subfolders These scripts are available to all the users of your Mac Your own scripts are stored in the ~/Library/Scripts/ folder (where ~ represents your home folder) and are available only to you You can move them to other folders as needed

[Description], 'stiff ~ ride' ) Although this syntax is acceptable, it s not nearly as readable and thus not widely used I highly encourage you to stick to the word NEAR for readability..

Zpri/Zsec = (Tpri/Tsec )2 Zpri/Zsec = (Epri/Esec )2 The inverses of these formulas, in which the turns ratio or voltage-transfer ratio are expressed in terms of the impedance-transfer ratio, are: Tpri/Tsec = (Zpri/Zsec)1/2 Epri/Esec = (Zpri/Zsec)1/2

Q: A:

It s also possible to pass an OR clause into the full-text engine: CONTAINS (pd.[Description], 'stiff OR ride' ). This will return all matches where either word stiff or ride is in the results. The final way to search is using prefixed terms. This is the closest to a form of the traditional SQL LIKE syntax, but with some important differences. LIKE performs pattern matching, and will search for the characters. If you were to enter and pd.[Description] like '%light%' as part of a SQL statement, it would return a hit on semilightweight. Assuming you only wanted search results that began with the word light, this would be an undesirable result. Prefixed term search, on the other hand, only looks for full words (not patterns) that begin with the word you re searching for. To use a prefixed term, append an asterisk (*) to the end of the word, like so: CONTAINS(pd.[Description], '"light*"' ). If you look at the results of a query with light*, you ll see the word lightweight returned. This word hasn t been in any of our previous results because it was neither a stemmer nor a thesaurus match. Instead, the full-text engine went to the index and found all words that began with light and bypassed any stemming or thesaurus activity. It s necessary to enclose the prefixed term inside double quotes; otherwise the search engine will only look for light and ignore the *. Additionally, even though they re called prefixed terms, you can place the * at the front of the search word as well as the end. Note that you may have seen light-weight in some results. This is because the hyphen (-) acted as a word breaker and the full-text engine considered light-weight to be two words light and weight.

When searching, especially with FREETEXT, it can be desirable to order your search results in terms of relevance returning results that most closely match your search term or phrase first, then those that match the least last. To achieve this, SQL Server provides two more functions: CONTAINSTABLE and FREETEXTTABLE. These directly correspond to the way CONTAINS and FREETEXT searching work, but instead of being used in the WHERE clause, they return a table. Because they both act the same in terms of how to use them, we ll use FREETEXTTABLE for our example:

Problem 18-3 Consider a situation in which a transformer is needed to match an input impedance of 500 , purely resistive, to an output impedance of 300 , also purely resistive What is the required turns ratio Tpri/Tsec The required transformer will have a step-up impedance ratio of Zpri/Zsec = 500/300 = 1/600 From the preceding formulas: