Teradata BTEQ – Learn Teradata in simple and easy steps starting from basic to advanced concepts with LABEL − Assigns a label to a set of SQL commands. Bteq Commands. 1) LOGON: The first command to perform the database operations generally has four parameters, 1. TDPID 2. User ID 3. BTEQ commands in Teradata provide great flexibility. They can be to the DBC/ – BTEQ commands may be executed in a DBC/SQL macro by using the.
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Teradata – BTEQ
In the above example, the output of select statement will not be printed in the display because of QUIET. The above example illustrates the single statement processing. However, these 60 different BTEQ commands are utilized in four areas. Submit the next request a certain amount of times.
Set Suppress On 1,2. Assigns severity levels to errors. It will enable you to print the total time of a specified request. Run file will execute the commands provided in the file by forward only fashion.
But a data warehouse also costs money — big money. This feature means that if a FastExport commandd MultiLoad job should be interrupted for some reason, it can be restarted again from the last checkpoint, without having to start the job from the beginning. To accomplish this, it is strongly recommended that surrogate keys be created and used for primary keys for all dimension tables instead of using natural keys.
If you drop the table, then stats will also be dropped 2 We generally collect commanfs to increase confidence levels but in some cases it doesn’t impact on the confidence levels while working with multiple tables. Two other minor reasons: Table related statements i.
Usually PPI’s bgeq defined on a table in order to increase query efficiency by avoiding full table scans without the overhead and maintenance costs of secondary indexes.
Use constants to specify index column contents whenever possible, instead of specifying the constant once, and joining the tables.
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Noticeably, BTEQ supports the conditional logic i. Hence this leads to inconsistent results 6. Repeat specifies the total number of requests to be submitted. Set Suppress On 1.
Learn Teradata: Bteq Commands
Specifies a footer to appear at the bottom of every page of a report. What would happen if employee table had million records and every time deptno would have to undergo Translation. It is all to do about Joins which is most important concern in Teradata. Skip all intervening commands and resume after branching forward to the specified label.
Designates a maximum error severity level beyond which BTEQ terminates job processing. If Delete operation was not successful then logging off from bteq.
Basic BTEQ commands | Nag Raju –
Collected statistics are stored in DBC. This may provide a small savings on performance. Yet, they are different in the following aspects: BTEQ limits the record size for exported files to approximately 64K for workstation builds and for mainframe builds.
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Asts Training 14 July at These demographics are useful bte optimizer to decide the execution of given query which in turn improves performance. What if collect stats is not done on the table?