how to delete duplicate rows from a specified table(only
single table)
how do you know which join is need to be used
Answer Posted / kishor solanki @ 9904762204
CREATE TABLE new_table as SELECT * FROM test GROUP BY url;
DROP TABLE test;
RENAME TABLE new_table TO test;
Is This Answer Correct ? | 1 Yes | 0 No |
Post New Answer View All Answers
what is myisam? : Sql dba
How do I run a query in pl sql developer?
what is a constraint? Tell me about its various levels. : Sql dba
What is sql and its types?
What is before and after trigger?
Is sql a programming?
Are null values same as that of zero or a blank space?
describe mysql connection using mysql binary. : Sql dba
What are primary key and foreign key and how they work?
how to run 'mysql' commands from a batch file? : Sql dba
Table1: Col1 col2 1 2 10 3 4 89 5 6 Table:2 Col1 col2 3 2 9 5 4 7 6 87 With the help of table1 and table2 write a query to simulate the fallowing results. Output1: Col1 col2 1 2 2 3 3 4 4 5 5 6 Output2: Col1 col2 2 3 10 4 5 89 6 7 1.Write query for single row to multiple row using sql statements. Eg:a,b,c,d,e,f Change to A B C D E F 2. Write query for multiple row to single row using sql statements. Eg2 A B C D E F Change to Eg:a,b,c,d,e,f Table1: Col1 col2 8 5 2 9 4 2 5 1.Write a query to select all the rows from a table1,if the value of A is null then corresponding B’s value should be printed in A’s value.if the value of A is null in that table then corresponding B’s value should be printed as 30. 2. write a query to find the sum of A and B .display the max among both. 3.write a query to find total number of rows from table 1. Note: if any column value is null in a row then that row should be considered as 2 rows. 4.write a query to display all the records of table1 except A containg 2 as well B containg 5. 5.rewrite the fallowing without using join and group by. Select b.title,max(bc.returneddate –bc.checkoutdate)” mostdaysout” From bookshelf_checkout bc, Book shelf B Where bc.title(+)=b.title Group by b.title. 6.rewrite fallowing query Select id_category from category_master X where exists (select 1 from sub_category Y where X.id_category=Y.id_category) Customer: Name phone1 phone2 phone3 bitwise A 23456 67890 12345 --- B 67459 89760 37689 --- Don’t_call Col1 67890 37689 1.q) update the customer table of bitwise with 1 or 0. Exists in don’t_call table menas show -1 Other wise -0. Output. Name bitwise A 010 B 010
What are keys in sql?
How to display Row Number with Records in Oracle SQL Plus?
Cite the differences between execution of triggers and stored procedures?
What is t sql used for?