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Нашёл 5 млн ответов for 'college strategies UNION ALL SELECT NULL,NULL,NULL,NULL,NULL-- ICKR'.

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UNION ALL SELECT NULL, *, NULL, NULL FROM email ... Use of an unqualified * with other items in the select list may produce a parse error. ... select NULL, email.*, NULL, NULL from email ... the tables when only using one table and selecting literals in addition to all the columns on that single...

https://www.docdroid.net/file/download/CxZkaO0/1590346252404-pdf.pdf

Word Pro - DB2_UNION_ALL_final.PDF
sales( sales_date date not null, prod_id integer, city_id integer, channel_id integer, revenue union all select * from g3) select prod_id, prod_desc, city, channel, sum(revenue) as “Total Revenue” The joins are now being performed below the unions. As before, each join has a smaller input set and is...

https://www.ibm.com/developerworks/data/library/techarticle/0202zuzarte/0202zuzarte.pdf

Enterprise COBOL for z/OS V4.2 Language Reference
NULL, NULLS Represents a value used to indicate that data items defined with USAGE POINTER, USAGE PROCEDURE-POINTER, USAGE FUNCTION-POINTER, USAGE OBJECT REFERENCE, or the ADDRESS OF special register do not contain a valid address.

https://www.ibm.com/support/knowledgecenter/SS6SG3_4.2.0/com.ibm.entcobol.doc_4.2/PGandLR/igy3lr50.pdf

Data Processing Inside PostgreSQL
Preventing NULLs. if (col != Null) insert/update BEGIN; SELECT ... FROM foreign WHERE col = key FOR UPDATE; IF found. UPDATE foreign SET col = NULL; UPDATE/DELETE primary; COMMIT

https://momjian.us/main/writings/pgsql/data_processing.pdf

Postgres Window Magic
PRECEDING ignores nonexistent rows; they are not NULLs. SELECT x, NTH_VALUE(x, 3) OVER w, NTH_VALUE(x, 7) OVER w FROM generate_1_to_5_x2 WINDOW w AS (ORDER BY x RANGE BETWEEN.

https://momjian.us/main/writings/pgsql/window.pdf

Mastering PostgreSQL Administration
# - Previous PostgreSQL Versions -. #array_nulls = on #backslash_quote = safe_encoding #default_with_oids = off /dev/null’ 4. SELECT pg_start_backup(’label’); 5. Perform le system-level backup (can be inconsistent) 6. SELECT pg_stop_backup(); pg_basebackup does this automatically.

https://momjian.us/main/writings/pgsql/administration.pdf

Using the Set Operators Questions
B. It returns duplicate values ignoring NULL values C. It returns duplicate values including NULL values D. It eliminates duplicate values and does not ignore A. It throws an error as TO_CHAR NULL cannot be used B. It executes successfully and gives the values for employees' id, first_name and current job.

https://www.tutorialspoint.com/sql_certificate/pdf/using_the_set_operators_questions.pdf

TTCN-3 Quick Reference Card
var address v_myPointer := null; var verdicttype v_myVerdict; objid { 0 4 0 }. reference of component or SUT interface (global scope); null is concrete address value; fixed TTCN-3 TYPE boolean integer float objid bitstring octetstring record record of set set of enumerated union type enumerated { NULL }.

https://blukaktus.com/TTCN3QRC_viewme.pdf

Inserting NULL values into a table and Selecting NULL values
select * from Employee1; -- Employee1 table does NOT have FK constraint superssn to PK ssn, so any value including NULL or ' ' will be accepted but NULL is taken as missing Insert Into Employee1 Values ('James', 'X', 'Brog1', '888660001','10-Nov-27','450 Stone, Houston, TX', 'M','55000', Null,'1')

http://cis.csuohio.edu/~sschung/cis430/HandlingNULLvalues.pdf

Query Languages for Semistructured Data
cannot be null (notice, it would make no sense to have an enrollment tuple without a student involved). – Right click on Postgresql, and select Connect – Right click on Databases, and select New Database – Enter a new name for the database, and click Okay – Highlight the database, and...

http://db.ucsd.edu/static/MAS201W16/02SQL.pdf