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SELECT CONCAT('Production.', objname) AS TableName, value AS [Description] FROM fn_listextendedproperty (NULL, 'schema', 'Production', 'table', default, NULL, NULL); GO
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Teradata String Functions are primarily used for various string manipulation. It also supports most of the standard string function along with the Teradata extension to those functions. Teradata String Functions. Below are the commonly used Teradata string functions: Read: Teradata Regular Expressions and Examples
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Query. select concat (col.table_schema, '.', col.table_name) as 'table' , col.ordinal_position as col_id, col.column_name as column_name, case when kcu.referenced_table_schema is null then null else '>-' end as rel, concat (kcu.referenced_table_schema, '.', kcu.referenced_table_name) as primary_table, kcu.referenced_column_name as pk_column_name, kcu.constraint_name as fk_constraint_name from information_schema.columns col join information_schema.tables tab on col.table_schema = tab.
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Use the CONCAT () function to concatenate string values from expressions or columns containing a NULL. This function takes a list of strings (or NULLs) and displays all these values in one string. There is no separator between the values, so the results (as in our example) may not be formatted as you'd expect. How can we correct this?CONCAT_WS(separator,str1,str2,...) Description. CONCAT_WS() stands for Concatenate With Separator and is a special form of CONCAT(). The first argument is the separator for the rest of the arguments. The separator is added between the strings to be concatenated. The separator can be a string, as can the rest of the arguments.
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SELECT IF(NULL, 5, 8) ==> NULL SELECT IF(true, IF(false, 1, 2), 3) ==> 2 SELECT IF(col1 = 0, 'N/A', col1) FROM MyTable COALESCE(expr1, expr2, expr3, ....) Returns the first non null value from the parameters or null if the entire list contains null values. Examples: SELECT COALESCE(NULL, 'a') ==> a
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A Teradata NULL value means an absence of information and is analogous to a SAS missing value. When SAS/ACCESS reads a Teradata NULL value, it interprets it as a SAS missing value. By default, Teradata columns accept NULL values. However, you can define columns so that they do not contain NULL values.
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I don't have any experience with Teradata, but I recall that Informix used to treat the very first character of every string as the "flag" whether this string was NULL (and not empty). If I recall correctly, ASCII 128 as the first character of any string indicated that this string was NULL. 1 UNION ALL SELECT NULL, concat (0x28, column1, 0x3a, column2, 0x29) FROM database2. table1-- Error Based When there is no output except a MySQL error, you can force your data extraction through the error.
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77) What is the picture clause of the null indicator variable? – S9(4) COMP. 78) What does it mean if the null indicator has -1, 0, -2? – -1 : the field is null. 0 : the field is not null-2 : the field value is truncated. 79) How do you insert a record with a nullable column? To insert a NULL, move -1 to the null indicator Aug 01, 2016 · Concat() concatenates strings, appending them to each other to create one bigger string. Concat() requires one or more values to be specified, each separated by commas. The previous SELECT statements concatenate four elements: The name stored in the vend_name column. A string containing a space and an open parenthesis 77) What is the picture clause of the null indicator variable? – S9(4) COMP. 78) What does it mean if the null indicator has -1, 0, -2? – -1 : the field is null. 0 : the field is not null-2 : the field value is truncated. 79) How do you insert a record with a nullable column? To insert a NULL, move -1 to the null indicator
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If you want Firstname + Lastname, where sometimes one or the other is NULL, use CONCAT. Concat adds the strings together and replaces NULLS with 0 length non-null value. SELECT CONCAT('a', NULL, 'c') will return 'ac' If you want Fn space + middle name space + LN, combine concatinate with CONCAT: SELECT CONCAT('a' + ' ', NULL + ' ', 'c')
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Jan 13, 2014 · If the range you want to concatenate is across columns (Say A1:K1), then you can skip the TRANSPOSE formula and write =CONCATENATE(A1:k1), Select A1:K1 and press F9, remove {}s. Keep in mind Since F9 replaces formulas with values , if your original data changes, then you must re-write the CONCATENATE(TRANSPOSE(…)) again. Compression is used to reduce the storage used by the tables. In Teradata, compression can compress up to 255 distinct values including NULL. Since the storage is reduced, Teradata can store more records in a block. This results in improved query response time since any I/O operation can process more rows per block.
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