astrosafe

A safe internet browser for learning environments.

Educators can enable their curious students to learn, discover, and explore online by creating focused learning environments. AstroSafe has built-in Ad-blockers and tracking prevention to make the internet a safer space with less distractions.

Educators are equipped with the tools to manage their students digital education. They can monitor their students activity in real-time & historically, and are given the tools to keep their students away from harmful content, whilst they learn and discover online.

Students can learn in the focused learning environments created by educators. They are presented a safe interface where they can explore the online content within a lesson, but not beyond it. Students also have a search engine which they can use to safely learn beyond their lessons.

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Adding new column with DEFAULT II

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Question of the Day

Adding new column with DEFAULT II

Which number did the two COUNT(*) return: 

DROP TABLE IF EXISTS #tmp
CREATE TABLE #tmp (id INT NOT NULL)

INSERT INTO #tmp (id) 
SELECT gs.value
  FROM GENERATE_SERIES(1, 5) AS gs

ALTER TABLE #tmp ADD my_value INT NOT NULL CONSTRAINT df_tmp_my_value DEFAULT 1

SELECT COUNT(*)  FROM #tmp AS t WHERE my_value = 1

ALTER TABLE #tmp DROP CONSTRAINT df_tmp_my_value

ALTER TABLE #tmp ADD CONSTRAINT df_tmp_my_value DEFAULT 2 FOR my_value

SELECT COUNT(*)  FROM #tmp AS t WHERE my_value = 1

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