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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BTEQ Basic TEradata Query is a command-driven utility used to 1 access and manipulate data, and 2 format reports for both print and screen output. He has to regularly run collect stats on the PPI column. However, these 60 different BTEQ commands are utilized in four areas. Inner Vs Commandds Joins Check which join works efficiently in given scenarios.
Basic BTEQ commands | Nag Raju –
If you want to disable this option then. You can continue a BTEQ command from one line to the next by including a dash character – as the last character commans the line.
Protect from changes in the source system, i. The optimizer determines if the cost of using a secondary index is cheaper than the cost of doing a full table scan. Display a row of dash characters before each report line summarized by a WITH clause.
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This article is very useful for me valuable ckmmands about Teradata Online Training. If no syntax errors were encountered, then the particular structure will be stored in the database. Joins happening on PPI columns to non PPI table would result in sliding window join which would further decrease the performance.
So if you donot have statistics collected then optimizer will use a Dynamic AMP Sampling method to get the stats. What would happen if employee table commandw million records and every time deptno would have to undergo Translation. Remember me on this computer. Displays the BTEQ software release versions.
Teradata Material: BTEQ
Replaces all consecutively repeated values with all-blank character strings. Commads the validity of the condition stated in the IF clause. BTEQ clmmands a report format, where Queryman outputs data in a format more like a. A secondary index is one which provides alternate access paths to the data thus helping in speeding of the queries. Mathematical operations are faster than string operations i. You might require output data in a flat-file format with binary data, no headings, etc.
BTEQ operates in two modes: These are a couple cases: This is the default output of BTEQ suitable for reports. You will have to take sometime in going through this topic. Nteq sorts take time, these are always done at the end of the query, and the sort time is directly dependent on the size of the solution.
However, for tables that have more than a few thousand rows It dependsCommanvs and MultiLoad are recommended for better efficiency. It will enable you to print the total time of a specified request. It is useful for reporting with the statistics of start and end times for the particular running cycle. SI cannot be created on column which is already defined as PI.
Teradata – BTEQ
In some cases, the strategic placement of this semicolon can improve the sql time of a group of sql statements. End the current session or sessions, but do not exit BTEQ. The data mart is a subset of the data warehouse which is usually oriented to a specific business line or team. Please note that Value ordered secondary index can be created only as NUSI and supports date, int,decimal up to 4 bytes.