Knowledge Walls
Gopal Rao
Mumbai, Maharashtra, India
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Queries
How to select all column values from table in sql How to rename the column in SQL How to create table in SQL How to add a new column to table in SQL How to change the data type of the column in SQL How to delete/remove column from table in SQL How to remove/delete the column(truncate) values from Table in SQL
Queries [cont'd]
How to delete table from database in SQL How to use select command in SQL How to add default value to the column in SQL How to add current system date and time to the column in SQL How to insert the values to the table columns in SQL How to create primary key to column in SQL How to create the foreign key for column in SQL
Queries [cont'd]
Referencing a foreign key to the primary key of the same table How to select the maximum value from sql column How to create a column with auto increment in sql server Identity column in sql server example Where condition in sql query And query in sql server Not like query in sql server
Queries [cont'd]
Or and and condition in sql server Like in sql server Using like and in sql together Subquery in sql server example Distinct in sql server example Having clause in sql server examples Count in sql server example
Queries [cont'd]
Truncate stored procedure sql server Create table in stored procedure sql server Delete / drop table in stored procedure sql server
Or and and condition in sql server in Queries of SQL Queries
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Hints 
"and" used to compare two column values in where condition.If both condition statisfies select command select the column which is related to that conditions.

"or" used to compare two column values in where condition.If any one condition statisfies select command select the column which is related to that conditions.

In following example and & or are used together.
Syntax
select columnName from tableName where (condition1 or condition2)and condition3;

//select the column where the condition1,condition2 any one of that statisfying and condition3
must be statisfying.
Example
Get the employee numbers for all employees who have a
leading job( i.e., Analyst or Manager) in project p1..

select emp_no from Works_on where (job='Analyst' or job='Manager')and project_no='p1';
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