Sql cheat sheet

May 5, 20161 like2,229 views

This document provides a cheat sheet for using SQL commands to interact with PostgreSQL databases, schemas, tables, and data. It lists commands for connecting to databases (\c) and schemas (\dn), viewing table details (\d), and sending output to a file (\o). It also summarizes commands for data manipulation like INSERT, UPDATE, DELETE, and transactions using BEGIN and COMMIT. Finally, it outlines common SQL queries using SELECT, WHERE, ORDER BY, LIMIT, JOIN and other clauses.

List database, schemas and tables
? show help
h SQL syntax help
h create table SQL help for create table
l list databases
c mydb connect to mydb database
dn list schemas from a database
dt list tables from public schema
dt sgn.* list tables from schema sgn
d blast_db show blast_db table details
o ﬁle.txt send output to ﬁle
q quit psql
SQL development commands
CREATE DATABASE mydb;
ALTER DATABASE mydb RENAME TO newname;
DROP DATABASE mydb;
CREATE TABLE mytable (col_name type constraints);
ALTER TABLE mytable RENAME TO newname;
DROP TABLE mytable CASCADE;
ALTER TABLE mytable ADD COLUMN column_name column_type;
ALTER TABLE mytable RENAME COLUMN column_name TO newname;
ALTER TABLE mytable DROP COLUMN column_name RESTRICT;
INSERT INTO mytable (column1,column2) VALUES (‘value1’,’value2’);
UPDATE mytable SET column1=‘value1’ WHERE column=value;
DELETE FROM mytable WHERE column=‘value’;
BEGIN; command; COMMIT; BEGIN; command; ROLLBACK;
PostgreSQL Cheat Sheet
BTI-SGN Databases Course 2016
SQL query commands
SELECT * FROM mytable;
SELECT mycolumn FROM mytable;
SELECT … WHERE mycolumn=‘value1’;
SELECT DISTINCT mycolumn FROM mytable;
SELECT COUNT(*) FROM mytable;
SELECT … ORDER BY mycolumn;
SELECT … WHERE mycolumn IN (1,2);
SELECT … WHERE mycolumn LIKE ‘%Abc%’;
SELECT … WHERE mycolumn ILIKE ‘%abc%’;
SELECT … WHERE mycolumn IS NULL;
SELECT … LIMIT 10;
SELECT … OFFSET 10;
SELECT … JOIN mytable USING(common_column);
SELECT … JOIN mytable ON(common_column1=common_column2);

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This study presents an eye-tracking user study for analyzing visual attention in a gaze-driven VR learning environment using a consumer-grade Meta Quest Pro VR headset. Eye tracking data were captured through the headset's built-in eye tracker. We then generated basic and advanced eye-tracking measures—such as fixation duration, saccade amplitude, and the ambient/focal attention coefficient K—as indicators of visual attention within the VR setting. The generated gaze data are visualized in an advanced gaze analytics dashboard, enabling us to assess users' gaze behaviors and attention during interactive VR learning tasks. This study contributes by proposing a novel approach for integrating advanced eye-tracking technology into VR learning environments, specifically utilizing consumer-grade head-mounted displays.

Presentatation_SM_muscle_structpes_funtionre_ty.pptxmuralinath2

Activities of smooth muscle such as cardio vascular system, digestive system, dense bodies, desmin, sarcolemma, intermediate filaments, thin filaments, connective tissue, sarco tubular system, single unit or visceral smooth muscle fiber, slow-wave rhythm, gap junctions, action potential with plateau, spike potential, pace maker waves, depolarization, repolarization, uterus, ureter, respiratory tract, multi unit smooth muscle fibers, nictitating membrane, iris of eye, arrector pili, urinary bladder, tone, electrical activity, excitatory junction potential, latent period and calcium-calnodulin complex

Nutritional Diseases in poultry.........Bangladesh Agricultural University,Mymemsingh

Poultry require at least 38 dietary nutrients inappropriate concentrations for a balanced diet. A nutritional deficiency may be due to a nutrient being omitted from the diet, adverse interaction between nutrients in otherwise apparently well-fortified diets, or the overriding effect of specific anti-nutritional factors. Major components of foods are – Protein, Fats, Carbohydrates, Minerals, Vitamins Vitamins are A- Fat soluble vitamins: A, D, E, and K ; B - Water soluble vitamins: Thiamin (B1), Riboflavin (B2), Nicotinic acid (niacin), Pantothenic acid (B5), Biotin, folic acid, pyriodxin and cholin. Causes: Low levels of vitamin A in the feed. oxidation of vitamin A in the feed, errors in mixing and inter current disease, e.g. coccidiosis , worm infestation Clinical signs: Lacrimation (ocular discharge), White cheesy exudates under the eyelids (conjunctivitis). Sticky of eyelids and (xerophthalmia). Keratoconjunctivitis. Watery discharge from the nostrils. Sinusitis. Gasping and sneezing. Lack of yellow pigments, Respiratory sings due to affection of epithelium of the respiratory tract. Lesions: Pseudo diphtheritic membrane in digestive and respiratory system (Keratinized epithelia). Nutritional roup: respiratory sings due to affection of epithelium of the respiratory tract. Pustule like nodules in the upper digestive tract (buccal cavity, pharynx, esophagus). The urate deposits may be found on other visceral organs Treatment: Administer 3-5 times the recommended levels of vitamin A @ 10000 IU/ KG ration either through water or feed. Lesions: Pseudo diphtheritic membrane in digestive and respiratory system (Keratinized epithelia). Nutritional roup: respiratory sings due to affection of epithelium of the respiratory tract. Pustule like nodules in the upper digestive tract (buccal cavity, pharynx, esophagus). The urate deposits may be found on other visceral organs Treatment: Administer 3-5 times the recommended levels of vitamin A @ 10000 IU/ KG ration either through water or feed. Lesions: Pseudo diphtheritic membrane in digestive and respiratory system (Keratinized epithelia). Nutritional roup: respiratory sings due to affection of epithelium of the respiratory tract. Pustule like nodules in the upper digestive tract (buccal cavity, pharynx, esophagus). The urate deposits may be found on other visceral organs Treatment: Administer 3-5 times the recommended levels of vitamin A @ 10000 IU/ KG ration either through water or feed.

Antonie van Leeuwenhoek- Father of MicrobiologyAnoja Kurian

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Parallel resonance circuits of science.pdfrk5867336912

Examining Visual Attention in Gaze-Driven VR Learning: An Eye-Tracking Study ...Yasasi Abeysinghe

Presentatation_SM_muscle_structpes_funtionre_ty.pptxmuralinath2

Nutritional Diseases in poultry.........Bangladesh Agricultural University,Mymemsingh

Antonie van Leeuwenhoek- Father of MicrobiologyAnoja Kurian

Gel Electrophorosis, A Practical Lecture.pptxDr Showkat Ahmad Wani

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Sql cheat sheet

1. List database, schemas and tables ? show help h SQL syntax help h create table SQL help for create table l list databases c mydb connect to mydb database dn list schemas from a database dt list tables from public schema dt sgn.* list tables from schema sgn d blast_db show blast_db table details o ﬁle.txt send output to ﬁle q quit psql SQL development commands CREATE DATABASE mydb; ALTER DATABASE mydb RENAME TO newname; DROP DATABASE mydb; CREATE TABLE mytable (col_name type constraints); ALTER TABLE mytable RENAME TO newname; DROP TABLE mytable CASCADE; ALTER TABLE mytable ADD COLUMN column_name column_type; ALTER TABLE mytable RENAME COLUMN column_name TO newname; ALTER TABLE mytable DROP COLUMN column_name RESTRICT; INSERT INTO mytable (column1,column2) VALUES (‘value1’,’value2’); UPDATE mytable SET column1=‘value1’ WHERE column=value; DELETE FROM mytable WHERE column=‘value’; BEGIN; command; COMMIT; BEGIN; command; ROLLBACK; PostgreSQL Cheat Sheet BTI-SGN Databases Course 2016 SQL query commands SELECT * FROM mytable; SELECT mycolumn FROM mytable; SELECT … WHERE mycolumn=‘value1’; SELECT DISTINCT mycolumn FROM mytable; SELECT COUNT(*) FROM mytable; SELECT … ORDER BY mycolumn; SELECT … WHERE mycolumn IN (1,2); SELECT … WHERE mycolumn LIKE ‘%Abc%’; SELECT … WHERE mycolumn ILIKE ‘%abc%’; SELECT … WHERE mycolumn IS NULL; SELECT … LIMIT 10; SELECT … OFFSET 10; SELECT … JOIN mytable USING(common_column); SELECT … JOIN mytable ON(common_column1=common_column2);

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