Where clause

The SAS code you wrote would eliminate the observation for subjectid=102. This is because the aeyn field is not populated for that row and is therefore eliminated by the WHERE clause in SAS. This is a classic parent-child data problem in clinical trial data, where the parent question is left unanswered but the child response is given. A way to handle this problem would be either to include the aetext field in the WHERE clause or to add a warning to the SAS log. The code in Program 1.4 does both. 

The way it works is that these variables are set by an application controller and can then be accessed by the AccessControlStrategy object to create the access control where clause. If a transaction involves multiple updates to the database, for example, the controller should start and finish the transaction and make sure all updates use the same Connection object to ensure they are either all committed or all rolled back. 

Notice that the Join keyword is not used, but rather just a comma separates the two tables being joined. The Join condition becomes a part of the where clause. The former syntax using the Join keyword will be used in examples throughout this book. 

Notice the use of the Where clause, similar to its use in the Select statement. It is important to use Where with Update. Otherwise every row of... 

Again, it is important to use a Where clause in the delete statement to specify precisely which rows are to be deleted and to prevent accidental deletion. 

The results of a Select statement are in the form of a table. This can be a subset of a single table, or the result of joining several tables. The exact set of rows is chosen by using various Where clauses. The use of Boolean operation such as and, or, and not allows a sort of union (or), intersection (and), and difference (not). For example ... 

Notice that each line in the select clause contains columns from only one table. Likewise, each line in the from clause contains one new table name with each table (after the first one) preceded by the join keyword. Each column uses a table name (a table alias) for brevity. Now that all the tables are properly joined, the columns selected can be arranged in any order desired. Some columns can also be removed from the select clause. The compound id and sample id may not be of interest in the final result, since these arbitrary values are used only to maintain relations among the tables. Finally, any additions to the where clause can be added as desired. 

In the SQL examples discussed previously, tables were joined with each other using the on condition to correlate the appropriate rows and a final where clause to restrict the selection of data. Without using the on condition, every row of one table would be joined with every row of the other, resulting in more rows than desired. Sometimes, one wishes to join all rows from one table with all rows from another to result in all possible combinations of rows. Unless the tables are relatively small, this may still result in more rows than desired. For example, in a table of nci.structures containing only 250,000 structures, combining all rows with each other would result in 62,500,000,000 rows Even if a where clause is used to restrict the number of selected rows, it is inefficient (and unnecessary) to produce combinations in this way. 

This SQL statement can be expanded in many different ways to satisfy many different requirements. For example, an additional where clause in the subselect statements could limit selection of reactants by molecular weight, cost, availability, etc. The type of amine or acid chloride could also be selected by changing the SMARTS in the matches function. For example, aromatic amines could be selected by using matches (smiles, c[NHl] ). 

A three-step catalytic reactors membrane separation (CRMS) configuration based on this concept is shown in Figure 13.13. A H2S reach stream would be compressed to 8 bar, preheated to 550 °C downstream of the third module, to be fed to the first reaction step consisting of fixed bed catalytic tubes. These catalytic tubes are immersed in the Claus reaction chamber, where Claus gases provide thermal duty required to carry out the H2S decomposition reaction. 

SPARQL queries start with namespace declarations in the PREFIX clause. The SELECT clause identifies the information that should be returned, in this case we specify a variable named supplier. Variables in SPARQL always start with a and can match any node (resource or hteral) in an RDF data graph. The WHERE clause specifies triple patterns that should be matched. A triple pattern is similar to a triple, but any part of it can be replaced by a variable. In the example query (see Listing 3.2), we are interested in all triples of the form ... 

A more complex example query is shown in Listing 3.3. This query returns not only the supplier but also the maximum working hours of mo Engl. Here, SELECT does not specify concrete variables that should be extracted, but rather states that the bindings for both specified variables should be returned in the result set (by Additionally, the WHERE clause now contains a graph pattern created through the conjunction of two triple patterns (through... 

STOP command is used. The WHERE clause of the DISPLAY command Is of the same form as In the SEARCH command and may Include non-structural data as well as structure and substructure search requests. The SEARCH and DISPLAY commands differ in that, while both search the database, save the qualifying registry numbers, and present a "hit count" to the user, the DISPLAY command also displays selected Information at the terminal for each compound. 

In the framework of the new approach third parties have a particular responsibility. Their task has become more difficult especially in cases where products are manufactured directly to the essential requirements. In that case competent interpretation and judgement needs to be applied in order to evaluate whether the required safety level is achieved or not. Not only safeguard clauses and their economic consequences should be avoided but also possible distortion of the market. An exchange of experience between bodies which are notified for a given directive is therefore normally organised with a view to ensuring its coherent application and to avoid such negative consequences. 

Where a Member State ascertains tliat a product, bearing the CE-marking and used in accordance with its intended use, is liable to endanger the safety of persons or health, it shall take all appropriate measures to withdraw such a product from the market. That Member State shall immediately Inform the Commission which is obliged to investigate whether or not the measure is justified. Where the Commission considers that the measure is justified, it shall immediately inform the Member State which took the initiative and also the other Member States. This entails that the other Member States must also take action against the product concerned. That latter disposition is referred to as the safeguard clause. 

The cmde product from the gasifier contains CO2 and H2S, which must be removed before the gas can be used to produce chemicals. The Rectisol process is used to remove these contaminants from the gas. This is accompHshed by scmbbing the product with cold methanol which dissolves the CO2 and H2S and lets the H2 and CO pass through the scmbber. The H2S is sent to a Claus sulfur plant where over 99.7% of the sulfur in the coal feed is recovered in the form of elemental sulfur. A portion of the clean H2 and CO are separated in a cryogenic distillation process. The main product from the cryogenic distillation is a purified CO stream for use in the acetic anhydride process. The remaining CO and hydrogen are used in the methanol plant. 

An optimized relationship is obtained between the beU jar, 60° swing-leaf valve, LN trap, baffle for the oil, and the plane of action for the diffusion pump (DP) top jet. The valve open area equals 0.38 of the cross-sectional area of the inside diameter of the furnace. The volumetric speed factor for water vapor is thus 0.38 x 0.9 crr 0.34, where 0.9 is the Clausing factor. 

A bleed from the scmbbing system is sent to a sour slurry stripper. The water is then clarified and can be recycled to minimize the volume of effluent to be biotreated and discharged or evaporated. The acid gas from the acid gas removal system and from the sour slurry stripper is fed to a Claus plant, where salable elemental sulfur (qv) is produced. For maximum sulfur recovery and minimal sulfur emissions, the Shell Claus off-gas treating process (SCOT) is used. 

MS As are recirculated. The stripped acid gases are fed to a Claus unit" where elemental sulfur is recovered from hydrogen sulfide. In view of air pollution control regulations, the tail gases leaving the Claus unit, R, should be treated for partial removal of the unconverted hydrogen sulfide. Table 3.10 summarizes the stream data. 

The note in clause 4.5.2.1 lists examples of documents that should be available at all locations where operations essential to the effective functioning of the quality system are performed. 

The note in clause 4.8 removes the words where appropriate , implying that procedures for product identification are required. 

Does ISO 9001 require the other types of policies to be defined and documented There is no requirement in clause 4.1.1 but in clause 4.2.2 there is a requirement to prepare a quality manual covering the requirements of the standard and this is where you should document your operational policies. While the quality manual could simply contain the quality system procedures, the guidelines given in ISO 10013 clearly indicate that whether or not this is the case, the manual should describe the organization s policies for meeting the requirements of the standard. These aspects are addressed in Part 2 Chapter 2. 

There is no requirement for you to state the policies to meet each clause of the standard but many organizations in fact do just this. ISO 9001 requires the manual to cover the requirements of the standard and ISO 10013 gives an example of how this may be done. ISO 10013, however, points you in the direction of producing a quality manual which is structured in the sequence of the key elements of the standard rather than the operations of your business. This is fine for third party auditors but not for your staff, who will probably want to know your policy on some aspect of your operations in order to make a certain decision. This is where you need operational quality policies organized around the operations of the business - such an approach is deemed acceptable in ISO 10013. 

Work instructions are identified in a Note to clause 4.2.2 of ISO 9001 and in clause 4.9.2 in ISO/TS 16949 where it states that job instructions are equivalent to work instructions. In ISO 9001 it implies that work instructions define how an activity is performed but in ISO 8402 1994 a procedure is defined as a specified way to perform an activity. There isn t enough difference between these two definitions to warrant a change in the term and its inclusion may well create much confusion, especially as ISO 9004-1 does not refer to work instructions or any other type of instructions. The list of topics that should be addressed by job instructions in clause 4.9.2 of ISO/TS 16949 certainly does not by itself imply that job instructions define how an activity is performed ... 

The standard requires documented procedures to be prepared consistent with the requirements of this international standard, but what does this mean Preparing procedures consistent with the requirements of the standard means preparing those procedures where the standard requires them. Outside ISO 9001, ISO/TS 16949 does not use the same wording to require procedures. In some clauses it requires a process and in others it requires methods or a methodology or a system. Although systems are not procedures, procedures are not processes and methods are not necessarily procedures, systems, or processes. Some methods, however, will inevitable need one or more procedures. By including systems, methods, and processes, the standard now requires 43 documented procedures directly. 

The quality plan would be a logical place for such controls to be defined but clause 4.2.3 does not specifically refer to subcontractor controls. Any intention that they be defined in the quality plan is hidden in 4.2.3.1(b) where it requires you to give timely consideration to the identification and acquisition of any controls etc. Some companies produce a Quality Assurance Requirement Specification to supplement ISO 9001 and also produce a Subcontractor Surveillance Plan. In most other cases the controls may be defined on the reverse side of the purchase order as standard conditions coded and selected for individual purchases. 

A situation where staff operate under self control is for telephone orders where there is little documentary evidence that a transaction has taken place. There may be an entry on a computer database showing that an order has been placed with a particular supplier. So how would you verify compliance with the requirements of this clause in such circumstances ... 

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