Frequently Asked Interview Questions

SQL Syntax

SQL Syntax Select Statement
SELECT "column_name" FROM "table_name"
Distinct
SELECT DISTINCT "column_name"
FROM "table_name"
Where
SELECT "column_name"
FROM "table_name"
WHERE "condition"
And/Or
SELECT "column_name"
FROM "table_name"
WHERE "simple condition"
{[AND
OR] "simple condition"} ...
In
SELECT "column_name"
FROM "table_name"
WHERE "column_name" IN ('value1', 'value2', ...)
Between
SELECT "column_name"
FROM "table_name"
WHERE "column_name" BETWEEN 'value1' AND 'value2'
Like
SELECT "column_name"
FROM "table_name"
WHERE "column_name" LIKE {PATTERN}
 Order By
SELECT "column_name"
FROM "table_name"
[WHERE "condition"]
ORDER BY "column_name" [ASC, DESC]
Count
SELECT COUNT("column_name")
FROM "table_name"
Group By
SELECT "column_name1", SUM("column_name2")
FROM "table_name"
GROUP BY "column_name1"
Having
SELECT "column_name1", SUM("column_name2")
FROM "table_name"
GROUP BY "column_name1"
HAVING (arithematic function condition)

Create Table Statement


CREATE TABLE "table_name"
("column 1" "data_type_for_column_1",
 "column 2" "data_type_for_column_2",
 ....

)

Drop Table Statement
DROP TABLE "table_name"
Truncate Table Statement
TRUNCATE TABLE "table_name"

Insert Into Statement
INSERT INTO "table_name" ("column1", "column2", ...)
VALUES ("value1", "value2", ...)
Update Statement
UPDATE "table_name"
SET "column_1" = [new value]
WHERE {condition}

Delete From Statement
DELETE FROM "table_name"
WHERE {condition}


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