A slug is a short name using human-readable keywords to identify a web page. For example, in the following URL
http://www.example.com/schools/play-school
the slug is play-school. This post shows how to automatically generate slug using SQL in MySQL.
Suppose we have a table schools a field name, and we wish to generate a slug for each school using
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SELECT * from table WHERE column NOT SIMILAR TO '(AAA|BBB|CCC)%'; |
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SELECT * from table WHERE column SIMILAR TO '(AAA|BBB|CCC)%'; |
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select count(*) from USER where BUSINESS_ID is null |
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ALTER TABLE tbl ALTER COLUMN BUSINESS_ID SET NOT NULL; |
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ALTER TABLE mytable ADD COLUMN mycolumn character varying(50); |
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ALTER TABLE mytable ADD COLUMN mycolumn character varying(50) DEFAULT 'whatever' NOT NULL; |
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WITH RECURSIVE children AS ( SELECT '0'::varchar AS parent_code, A.level_code, A.level_name, A.code_length, 1 AS DEPTH FROM c_levels A WHERE A.level_code ='05' UNION ALL SELECT B.parent_code AS parent_code, B.level_code, B.level_name, B.code_length, DEPTH + 1 FROM c_levels B JOIN children C ON ( B.level_code = C.parent_code )) SELECT * FROM children ORDER BY DEPTH DESC |
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UPDATE dummy SET customer=subquery.customer, address=subquery.address, partn=subquery.partn FROM (SELECT address_id, customer, address, partn FROM /* big hairy SQL */ ...) AS subquery WHERE dummy.address_id=subquery.address_id; |
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UPDATE m_lmr_period SET lmr_status = CASE WHEN lmr_status IN ('P') THEN 'O' WHEN lmr_status IN ('C') THEN 'P' ELSE 'O' END |
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INSERT INTO table2 (column_name(s)) SELECT column_name(s) FROM table1; |